Exploits

“

I have considered an appropriate punishment for the good-for-nothings responsible for this horrendous breach of conduct. Death, of course—but death is too good for disappointments such as these. — The Administrator on exploiters

”

An exploit is a bug or unintended feature of gameplay that is deliberately and knowingly used by the player to gain an advantage. For example, if a bug enables a player to be immune to damage and a player knowingly uses it, it is an exploit. In contrast, bugs or problems which either do not affect gameplay or that are not intentionally triggered are classified as glitches.

General Exploits

• With any projectile weapon, a player is able to inflict friendly fire damage on teammates. This can be done by changing to spectator team shortly after firing a projectile. After dying any friendly player hit by the projectile will be damaged. The name of the exploiter will appear white on the killfeed notification if he kills the victim.

• By using the "partner taunt glitch", you can use enemy Teleporters.

• By using a Loopable Taunt as soon as you exit a Teleporter you will have an fov higher than the set limit.

File overriding

The game has a console variable sv_pure that controls which files clients are allowed to override. By default, a server uses sv_pure 0 unless the server manager decides otherwise. This can be abused to use tampered materials that render on top of walls and other trickery.

There are four modes for the variable:

-1

Does not apply any rules or restrict which files the client may load

0

Applies the rules from cfg/pure_server_minimal.txt only (forcing the purity of only a few critical files such as the executables)

1

Applies the rules from cfg/pure_server_full.txt and then the ones from cfg/pure_server_whitelist.txt (forcing the purity of the files chosen by the server manager)

2

Applies the rules from cfg/pure_server_full.txt. (forcing all files to be pure)

By Class

Scout Exploits

• With the Flying Guillotine, if the player runs towards a thin wall and throws the projectile, the projectile can go through the wall.
• With the Mad Milk,if the player dies holding the Mad Milk,then throws theMad Milk in the dropped[ [Mad Milk]] and picks up the dropped Mad milk the player is able to do infinite jumps.

Soldier Exploits

• After gaining a full rage meter for any banner item (Buff Banner, Battalion's Backup, or Concheror), equipping a different banner and blowing the horn while touching a resupply locker will transfer the rage to that banner.
• The Cow Mangler 5000 can be fired through thin walls. This is mostly noticeable in Thunder Mountain's spawn gates.
• The Kamikaze taunt can be used to kill enemies on the other side of a wall or closed setup gate.
• The Beggar's Bazooka can be loaded to 3 rockets, and if you taunt, you store the rockets until that taunt is ended. Taunts that make a player interact (High Five!, Conga, etc.) will only let the rockets from the Beggar's Bazooka once someone interacts or the taunt is cancelled.

Pyro Exploits

• Using any of the Flamethrowers and firing in a downwards position will sometimes cause flame particles to go through thin walls, such as setup gates, and ignite players on the other side of the gate.
• The Flare Gun, Detonator, and Scorch Shot projectiles may sometimes be able to launch itself through thin walls if aimed at the right place
• Taunting with the Balloonibouncer in front of a wall will cause the player to submerge into the wall, causing the Pyro to be not visible or to be visible on the other side of the wall if the wall is thin enough.

Building and Engineer Exploits

• An Engineer can constantly use their Teleporter to farm points, as they are awarded one half-point for every time they take their own Teleporter. (Xbox 360 and PS3 versions only)

• If an Engineer switches to a different Wrench while having the Gunslinger equipped, holding an undeployed Mini Sentry Gun toolbox inside of a spawn room, the player can still place down a Mini-Sentry Gun.

• Building a Teleporter Exit on a staircase and then an Entrance above it will cause players to become trapped and unable to move when they use the Teleporter. This is known as a "tele-trap".
  • This exploit can be used to launch the player a long distance. By building a Sentry Gun and shooting the player with the Wrangler in the direction that the player wants to fly, then destroying the Teleporter Entrance, the player will be launched a long distance. This occurs because the knockback from the Sentry Gun's bullets are stored until the Teleporter Entrance is destroyed.

Heavy Exploits

• If a Heavy is stunned by a ghost, the Horseless Headless Horsemann or during humiliation while holding a melee weapon, then he can still attack via alt-fire.
• If a Heavy is changing his loadout in a loadout closet while inside the Dispenser He is not able to attack.

Medic Exploits

• "Needle Boosting" involves a player standing over a Medic, who then proceeds to shoot their Syringe Gun upward as the player jumps. Due to a physics error, the Medic's Syringe Gun needles propel the target upward. (Xbox 360 and PS3 versions only)
• When using a Strange Medi Gun during setup time, you can use the ÜberCharge build rate boost to rank up the weapon. The same applies to Mann Vs. Machine. This may or may not be intended.

Spy Exploits

• Spies can place Sappers through thin walls, sapping buildings on the other side. (PS3 version only)

Map Specific Exploits

Frontier

• A Heavy wielding an all-class melee weapon can suicide on the cart, then another Heavy wielding any kind of Glove can pick up the dropped melee weapon, resulting in the heavy dropping the gloves into the world. The model for the various forms of gloves can be placed into the cart by repetitively switching between the two weapons, until the glove model is stuck into the train, separating the platform from the train, and the head of the train keeps moving while the platform is stopped. (so long as the BLU team stays on the disconnected platform.)

• A RED Engineer can build a teleporter in the final spawnroom near the Resupply cabinet which makes it possible for BLU Spies to get into the RED spawn room.

• Snipers can shoot through a window frame near the last control point.

• Li'l Chew Chew can be glitched so that the platform will be far behind the actual engine. This lets the BLU team push the train without being near the engine.

• When the final point is capped, any BLU players who were set to respawn at that time will appear in RED's final spawn room, instead of BLU's intended final spawn room.

• Players can camp RED team's second spawn (BLU's 3rd) by using sticky bombs and firing at the top of a wall where the invisible walls cause the bombs to fall into the spawn area.

2Fort

• Entering Enemy's Spawn In both bases, an Engineer can build a Teleporter using the hole which lets players leave the left spawn room. They must build a Sentry Gun under the hole and jump onto it, then crouch jump whilst repeatedly attempting to build a Teleporter Exit inside the spawn room, which enemy Spies can use to enter the base. This exploit works as there is no func_nobuild brush stopping Engineers from building from under the spawn. (Fixed in PC/Mac/Linux version, broken in 360 and PS3 versions)

• Entering Enemy's Spawn 2 A hole in the lower, right side of the No Enter symbol for BLU's base (the one next to the haystacks) can be used by RED players to get into the BLU spawn room. (Present in the Xbox 360 and PS3 versions.)

• Holding Enemy Spawn Doors Open - Both teams can hold open the enemy's spawn door at the hay room by running into it while it is open. Should a member of the RED team attempt this, there is a chance for the player to get stuck in the door, unable to move, and end up getting dragged up and down with the door as the BLU team enters and leaves the spawn area.

• Pointless Room - There is a spot in each Intelligence room, where a player can get other players stuck. This is a dead-end, because players cannot escape, unless they suicide. By building a Dispenser on the left wall of the left corridor (the one facing the Intelligence) and then by using the "jump through roofs" exploits to build a Teleporter Exit, a player can trap other players on their team. Enemies cannot be damaged from here. (Fixed in PC/Mac version, broken in 360 and PS3 versions)

• Roof Holes - A hole in the roof of the BLU team's 'upstairs' room (above and behind the balcony) allows arcing projectiles (grenades and needles) to be fired into the 'upstairs' room just outside the BLU team's main respawn room. It can be used for taking out Sentry Guns placed in the corner of the 'upstairs' room. This looks intentional; however the same cannot be used on the RED team's base as chicken wire covers the hole. (Fixed in PC/Mac/Linux version, broken in 360 and PS3 versions)

Badwater Basin

• BLU 1st Spawn
  • The tall pillar of rock in the middle of the respawn wall has a small place to stand on near the top. Soldiers and Demomen can camp up here.
  • The corner rock by the leftmost exit can have a sentry place if the Engineer can rocket jump and wrangle.

• Final Checkpoint
  • Right before the ramp down to the final checkpoint by the map room is a small roof. Sentry Guns and Teleporters can be built on this roof.
  • Between the 2 upper spawn doors in the corner above the lower spawn and health pack room is a small ledge. Sentry Guns and Teleporters can be built there.
  • The Pyro was able to suicide on the final point and his flamethrower would fall through the last point and it would detonate it. This has since been patched.

Gravel Pit

• Spawn Building - RED Engineers can build inside their spawn area by crouching on the office chair and facing the computer panel to its right. Once the vertical position of the blueprint changes to match the visible height of the panel (which only occurs in a particular spot), the Engineer can place their construction at a specific mid-air point (this essentially means repeatedly jumping while spamming the keys bound to Crouch and Primary Fire). (Fixed in PC/Mac version broken in 360 and PS3 versions)

Steel

• It is possible for a Pyro using any flamethrower to attack any enemies that are sitting on point A from behind the sliding steel door.

Well (Control Point) and Well (Capture the Flag)

• Glitched Area - Backroom (Final Control points in cp_well and Intelligence room in ctf_well) - Allows Soldiers, Demomen, and Engineers to get into the roof area and on the beams. It is unconfirmed if this is an exploit or not as both teams can use it, higher areas are blocked by invisible walls and this hasn't been fixed by Valve even though it's been around a while.

Suijin

• Infinite Kamikaze Taunt - If a Soldier goes under one of the bridges in the middle he can repeatedly perform the Kamikaze taunt without dying. This can also be used by a Medic with the Meet the Medic (taunt), crashing a server.

Upward

• Taunt kill through floor - If a Soldier can get to the stairway, (the one under the health and ammo, second RED spawn) and rocket jump to a ledge, the Soldier and use the Equalizer or Escape Plan can kill players on the RED team league. And standing in the right place won't kill you using the taunt kill.
• Attacking first from last - On the path right outside the building housing the last point, it is possible to shoot over the wall into BLU's first spawn, as well as onto the path between the cart's initial position and the first point. However, this is extremely inefficient as only certain projectile weapons can achieve this alone.

Warehouse

• Bonk Scout - If a Scout drinks bonk and intercepts, he can still carry the ball while under the influence of bonk.

Mountain Lab

• Player out of the map - BLU Engineers can build a teleporter through a wall in BLU spawn.

Pipeline

• Entering Enemy's Spawn - In the third map rotation, an Engineer can build a teleporter on the scale and let enemy Spies into the spawnroom.

Patched Exploits

Title	Description	Exists on PC	Exists on 360	Exists on PS3
Infinite Sentry Health	Whereby a Spy and an Engineer working together can infinitely increase the health of a Sentry Gun by using the Red-Tape Recorder	No	Never Existed	Never Existed
Infinite Heavy Overheal	Whereby a Heavy could use a Dalokohs Bar and the Gloves of Running Urgently to infinitely increase his overheal.	No	Never Existed	Never Existed
Infinite Teleporter Health	Whereby an Engineer could infinitely increase the health of a Teleporter by moving and destroying the entrance.	No	No	No
Backstab Not Breaking Disguise	Whereby a Spy could backstab while retaining their disguise.	No	Yes	Yes
Bunny Hopping	A jumping technique that allowed players to move faster than they should by bypassing the velocity cap.	No	No	Yes
Reference Pose Heavy	Whereby a Heavy could go into a reference pose by spinning the Minigun in spawn and switching class to Heavy. This is still performable, but another method is required.	No	No	?
Cloaked Backstab	Whereby a Spy could backstab while remaining Cloaked.	No	No	Yes
Critical Hit Storing	Whereby players are able to store Critical hits in their weapon.	No	No	Yes
Crouch Jump	Whereby players are able to build Teleporters in places that they should not be able to, such as spawn rooms.	No	No	No
Spectator Achievements	Whereby players could complete achievements by spectating other players who earned them.	No	Never Existed	Never Existed
Door Block Exploit	Allowed Engineer players to block spawn doors with the help of Teleporters.	No	No	Yes
Heavy Minigun Exploit	Whereby a Heavy was able to run and simultaneously rev up or fire their Minigun.	No	No	Yes
Intelligence Teleportation	An exploit that allowed a player to teleport with the intelligence by dropping it next to the Teleporter, then picking it up as they were teleported.	No	Yes	Yes
Melee Weapon Switching Exploits	Whereby players could attack and then instantly switch to another weapon and back again, making the next attack with the melee weapon land instantly, and stack on the attack they were already making.	No	No	Yes
Needle Boosting	Whereby players could be boosted by the Medic's Syringe Gun needles.	No	Yes	Yes
Occlusion Visualization Cheat (cvar)	Allowed players to make use of the built-in Performance UI to enable visible occluders which would let you then see through walls.	No	No	No
Permanent ÜberCharge	Whereby a disconnected Medic could continue to ÜberCharge his target indefinitely.	No	No	Yes
Permanent ÜberCharge #2	Whereby a Medic is able to give himself an ever-lasting ÜberCharge for the rest of the round. It requires a player to have unlocked the Kritzkrieg, and is done by switching to the Kritzkrieg whilst deploying the Über in the team respawn room. This can also be done the opposite way around - by switching to the Medi Gun, giving the player infinite Critical hits for the rest of the round. Standing near a Dispenser (or Payload while attacking), healing a teammate, or being healed by a teammate will however end the charge.	No	Never Existed	Never Existed
Permanent Atomic Punch	Where a Scout becomes permanently under the effect of Bonk! Atomic Punch by drinking the item while moving into a supply cabinet.	No	Never Existed	Never Existed
Teleporter Exploit	Whereby an Engineer could earn himself large amounts of points by using his own teleporter repeatedly.	No	Yes	Yes
Wall Sap	Whereby a Spy could attach a Sapper to enemy buildings through thin walls.	No	No	Yes
Cart Upgrading	Where BLU Engineers could "upgrade" the Dispenser on the cart by hitting where the blue stream comes out of the pipe on the cart, allowing it to dispense health faster than normal.	No	Never Existed	Never Existed
Level 3 Combat Mini-Sentry Exploit	Whereby an Engineer could build a Combat Mini-Sentry that fires rockets by building a Level 3 Sentry Gun, switching to Gunslinger (either by respawning or using resupply lockers), then re-deploying the Sentry Gun. The resulted Sentry Gun would take only 2.5 seconds to build like a Combat Mini-Sentry, but fired rockets like a normal Sentry Gun.	No	Never Existed	Never Existed
Multiple Buildings Exploit	Several methods where the Engineer (or in some cases the Spy) could build multiple copies of all his buildings.	No	No	No
Multiple Buildings Exploit #2	An Engineer could pick up a building with the "Automatically respawn after loadout changes in respawn zones" option and change their loadout hereby glitching them into having a building being "carried" and allowing the Engineer to build multiple buildings using the "build x" commands.	No	Never Existed	Never Existed
Multiple Buildings Exploit #3	Whereby an Engineer can build an unlimited number of buildings by using the commands, "build 0 x", "build 1 x", and "build 2 x" (where x is the number of the building), and a Spy can build an unlimited number of Dispensers using "build 0 x" (where x is the number of the building).	No	Never Existed	Never Existed
Invisible Buildings Exploit	Any Engineer picking up a building and immediately taunting would be able to use the weapon they taunted with whilst holding this building. If placed back down with the "build x" commands, these buildings would be invisible, leaving only the sentry shadow, Dispenser screen or teleporter effect.	No	Never Existed	Never Existed
Infinite Crit Exploit	An Engineer that had revenge Crits on the Frontier Justice could abuse a loadout-related glitch to gain infinite Crits for all weapons, including ones that don't normally Crit (such as the Southern Hospitality).	No	Never Existed	Never Existed
Powerjack Heal Exploit	A Pyro could switch to the Powerjack before an ignited enemy died from afterburn and still get the +75 health.	No	Never Existed	Never Existed
Permanent Regen Exploit	By disconnecting from the server mid-taunt with the Amputator, the healing effect would stay on all in the healing radius (through death and class change), until they disconnected or the map changed.	No	Never Existed	Never Existed
Surviving Kamikaze Exploit	Performing the Kamikaze taunt with the Rocket Jumper equipped to the primary slot will allow the Soldier to survive the taunt with no blast damage. This was removed and later re-implemented as a feature.	No	Never Existed	Never Existed
Spectator Halloween Gift Grab	Briefly during the 2010 Halloween event, it was possible to pick up gifts whilst in spectator mode simply by running the free camera into them.	No	Never Existed	Never Existed
Huntsman Reload Exploit	By switching to a different weapon and quickly switching back, it was possible to reload the Huntsman faster than intended.	No	Never Existed	Never Existed
Payload Last point Exploit	A player can continuously swap weapons on top of last point until weapon falls through hole and automatically explodes with no Cart needed and the Cart will be invisible.	No	Never Existed	Never Existed
Invis Sapper Exploit	Spies can place Sappers on Buildings while being invisible. They can use the Red-Tape Recorder to make the sentry unbuild itself without having the Engineer being able to fix it.	No	Never Existed	Never Existed
Floating Lasers Exploit	A Sniper using The Classic can commit suicide after charging the shot, leaving the laser in midair. Doing this repeatedly can crash the server.	No	Never Existed	Never Existed
Quantum Crouch	Where crouching was used to see outside of the playable area. This could be exploited to place buildings at invalid locations.	No	Yes	Yes
Teleporter Behind RED Bamboo	On Suijin, it is possible for an Engineer to build a teleporter exit behind the bamboo across from the front spawn door on the RED side of the map, trapping them. Does not happen to the BLU side.	No	Never Existed	Never Existed
Stuck PASS Time Jack	On Warehouse, if someone throws the ball between the crates and the wall, the ball can no longer be scored for either team.	No	Never Existed	Never Existed

Update history

October 5, 2007 Patch

• Fixed teleporter/spawn doorway exploit.

October 25, 2007 Patch

• Fixed a Spy backstab exploit where you could stab a player who was not facing away from you.

October 31, 2007 Patch

• Added anti-bunny hopping code.
• Fixed a weapon switching exploit that allowed Snipers to fire slightly faster than intended.

November 7, 2007 Patch

• Fixed exploit that allowed players to teleport with the intelligence.
• Fixed several melee weapon switching exploits.

November 15, 2007 Patch

• Fixed exploit where spectators could spawn into the world without actually joining a team.
• Fixed an exploit that would allow players to jump out of the map in Hydro.

November 20, 2007 Patch

• Fixed jump/taunt exploit.

November 21, 2007 Patch

• Took a more aggressive approach to solving the exploit that would allow players to get underneath terrain in Team Fortress 2.

December 20, 2007 Patch

• Fixed exploit where the Medi Gun ÜberCharge wouldn't drain if you switched weapons.

December 31, 2007 Patch

• Fixed Sniper quick-switch exploit allowing them to avoid zoom/unzoom times.
• Fixed an exploit allowing players to spawn into the enemy territory at the start of a round.

February 19, 2008 Patch

• Fixed Badlands exploits and missing textures.

March 20, 2008 Patch

• Plugged an exploit where the server could send executable code to the client.

April 29, 2008 Patch (Gold Rush Update)

• Fixed exploit where clients could start benchmark mode on servers.
• Fixed drowning exploit that allowed players to regenerate health.
• Fixed reload exploit that allowed plays to fire instantly after switching weapons.
• Minor fix to stat gathering to prevent players using sv_cheats to easily garner achievements.
• Fixed a clip brush exploit outside blue Sniper deck on 2Fort.

April 30, 2008 Patch

• Fixed potential "nuke" exploit in rcon subsystem.

May 2, 2008 Patch

• Fixed exploit where players could drop weapons onto the ground for other players to pickup.

February 18, 2009 Patch

• Fixed loadout exploit.

July 14, 2009 Patch

• Fixed setinfo exploit that allowed restricted convars to be set while connected to a server.
• Fixed "jointeam unassigned" exploit.
• Fixed being able to respawn during the chat time before a level change.
• Prevented some exploits based on mat_dxlevel being changed in-game.

August 13, 2009 Patch

• Fixed an exploit where the Huntsman could be reloaded faster than intended.

December 7, 2009 Patch

• Fixed Spies being able to disguise while performing a taunt.

April 30, 2010 Patch

• Fixed the Engineer being able to build more than one of each type of building.

July 9, 2010 Patch

• Fixed a bug that allowed sapped buildings to be picked up by the Engineer.

July 13, 2010 Patch

• Fixed an exploit where Engineers could create level 3 mini-Sentry Guns.

July 19, 2010 Patch

• Fixed a bug where Teleporters could be given more than their normal amount of health.

July 21, 2010 Patch

• Fixed a speed exploit related to benchmarks.

October 18, 2010 Patch

• Fixed a Sentry Gun exploit that let Engineers build multiple sentries.
• Fixed Engineers being able to build level 3 mini-sentries using The Wrangler.

October 19, 2010 Patch

• Fixed another Sentry Gun exploit that let Engineers build multiple sentries.
• Fixed Engineers being able to build level 3 mini-sentries using The Wrangler for real this time.

December 2, 2010 Patch

• Fixed Engineers being able to destroy sapped buildings by issuing the command directly in the console.

February 22, 2011 Patch

• Fixed a server crash exploit caused by malformed network packets.

February 24, 2011 Patch (Community Map Pack Update)

• Fixed another server crash exploit caused by malformed network packets.

March 10, 2011 Patch (Shogun Pack)

• Fixed clients being able to use particle exploits on sv_pure servers.

May 6, 2011 Patch

• Removed ConVars "r_portalscloseall" and "r_flashlight_version2" to fix a wallhack exploit.

June 23, 2011 Patch

• [Undocumented] Fixed an exploit with the Chargin' Targe that allowed greater turning control than intended.

July 1, 2011 Patch #2

• Fixed an exploit with the Heavy's Buffalo Steak Sandvich.

July 7, 2011 Patch

• Various clipping and exploit fixes on Barnblitz.

August 23, 2011 Patch

• Fixed an infinite crits exploit using The Diamondback

September 2, 2011 Patch

• Fixed a server crash exploit caused by invalid player viewangles.

September 15, 2011 Patch

• Fixed several exploit areas on Upward.

October 13, 2011 Patch

• An exploit with non-printable characters causing lag on Windows servers has been fixed.
• Various geometry fixes on Frontier.

November 16, 2011 Patch

• Fixed an exploit that allowed untradable items to be traded with Steam trading.
• Fixed a teleporter griefing position near control point B on Upward.

December 16, 2011 Patch

• Fixed an exploit with The Eureka Effect and The Phlogistinator where the effects could activate without taunting in high-lag situations.

December 23, 2011 Patch

• Fixed a Spy-cicle exploit.

February 2, 2012 Patch

• Fixed Nobuild exploits on Foundry.

February 23, 2012 Patch

• Adjusted Blue team's func_respawnroom in stage 1 to be flush against the door on Dustbowl.

April 17, 2012 Patch

• Fixed being able to place buildings in nobuild zones.
• Fixed Red team Pyros being able to grief teammates by attacking them with the flamethrower and then switching to team Spectator during the attack.

May 10, 2012 Patch

• Fixed a bug that allowed buildings to be built in nobuild/respawn volumes.

June 28, 2012 Patch

• Fixed exploit that allowed Beggar's Bazooka to indefinitely hold rockets in the chamber without misfiring.
• Engineers can no longer build Teleporters behind the spawn on Doomsday.

July 2, 2012 Patch

• Fixed exploit where the Scorch Shot could fire its short range kill pellet at the very beginning of the taunt.

August 10, 2012 Patch

• Fixed a Medi Gun exploit that could leave players indefinitely invulnerable.

September 4, 2012 Patch

• Added nobuild to stairs on center building where Engineers could build out of reach of Sentry Busters.
• Fixed an exploit on Mannworks to prevent players from getting to normally unreachable areas.

November 16, 2012 Patch

• Fixed an Mann vs. Machine exploit that allowed permanent ubercharge/critboost effects on non-Mann-Up servers.

December 20, 2012 Patch

• Fixed an exploit that allowed players to be permanently invulnerable.

February 1, 2013 Patch

• Fixed exploit where players could be pushed into enemy spawn rooms by the Payload cart.
• Fixed a ConVar exploit that allowed malformed values to circumvent range checks.

July 2, 2013 Patch

• Fixed a case where a Medic deploying Kritzkrieg on a Spy would sometimes result in permanent crit boost.

September 16, 2013 Patch

• Fixed a noclip exploit related to dueling and coaching.

June 11, 2014 Patch

• Fixed an exploit where teleporters could build up a large amount of health.

July 24, 2014 Patch

• Fixed a case where move speeds could be exploited using player angles.
• Fixed an exploit related to Bonk! Atomic Punch and Crit-a-Cola.
• Fixed a bug related to cancelling the Eureka Effect taunt and teleporting immediately.

August 13, 2014 Patch

• Fixed an exploit where Engineers could build level 3 mini-Sentry Guns.

September 15, 2014 Patch

• Fixed an exploit where players could circumvent successful kick votes.

October 1, 2014 Patch

• Fixed an exploit that allowed item nametags to go beyond the 40 character limit.

October 15, 2014 Patch

• Fixed an exploit related to clients uploading files to servers.

October 20, 2014 Patch

• Fixed another exploit that allowed clients to have an out-of-date, corrupt, or modified version of items_game.txt.

October 29, 2014 Patch

• Fixed an exploit that allowed players to remove the ghost condition.

November 4, 2014 Patch

• Fixed players using the tiny-melee-only curse to get outside of the playable area of the map.

November 5, 2014 Patch

• Fixed the Rescue Ranger being able pick-up buildings through walls.
• Fixed Engineers being able to pick-up buildings during Merasmus's third-person curses.

November 13, 2014 Patch

• Fixed an exploit that involved players killing teammates with the meteor spell by switching to Spectator.
• Fixed a bug that allowed weapons to be equipped in invalid loadout slots.

January 15, 2015 Patch #1

• Fixed an exploit related to the Sniper's scope HUD panel.

February 11, 2015 Patch #1

• Fixed an exploit related to the "connect" command allowing servers to redirect clients when they should not be able to.

March 12, 2015 Patch

• Fixed an exploit related to material .vmt files and playing on servers using sv_pure.
• Fixed an exploit where clients could bypass the name change timer.
• Fixed an exploit related to the Gunslinger and hitting teammates to generate a guaranteed third hit that is critical.

June 2, 2015 Patch (Gun Mettle Update)

• Fixed a .wav file exploit
• Fixed a .bsp file exploit

September 14, 2016 Patch

• Fixed an exploit related to placing buildings outside of the playable space.

September 15, 2016 Patch

• Fixed a case where crouching was used to see outside of the playable area. This could be exploited to place buildings at invalid locations.

April 20, 2017 Patch

• Fixed an exploit where players could remain Übercharged beyond the normal time period.

See also

• Team Fortress Classic Exploits