Community Mann vs. Machine strategy

General Strategy

• Teamwork is more vital than ever. Make sure to communicate at all times.
• The Robots don't drop ammo so take note of ammo placements and consider getting Engineers to place Dispensers at choke points.
• Always remember to reload whenever you get a chance.

Scout

• Due to the defensive nature of this mode the Scout is at a disadvantage with low health and short range weaponry. To counter this he's given a wider money gathering radius, gets health from gathering money and respawns much quicker than the other classes.
• The Scout's role is not restricted to money gathering, with piercing upgrades his primary weapons can take out whole crowds of enemies at close range.

Soldier

• Upgraded banners can affect all team-mates meaning more ground can be covered rather than clustering around the Soldier.
• Be aware that Giant Heavys can destroy your rockets and worse Giant Pyros can airblast them. Consider using a secondary weapon against them.

Pyro

• The Pyro's airblast is one of the few ways to deal with ubered giants and can be upgraded to make seperating Medic and patient quicker.
• Whether dressed in fine suits or plate metal Spies are flammable all the same. If the Announcer alerts you to the presence of Spies start Spy checking.

Demoman

• The robots follow pre-set paths so Sticky Bomb carpets are more effective than in normal gameplay. Upgrade for maximum effectiveness.

Heavy

• Unique to Heavy is the unlockable ability to shoot and destroy projectiles with his Primary. Use this to counter Giant Soldiers.

Engineer

• Sentry Guns are vital for controlling choke points and dealing big damage to giant and the tank but attract Sentry Busters. Keep an eye out at all times.
• Use a Teleporter to make travel between the frontlines and base quicker. It may make the difference between safety and Payload delivery
• Use your Wrangler if you have one. When you have a 100% upgraded Sentry Gun, the giants will fall very quickly.

Medic

• To make the most use out of your canteen sharing upgrade use the Medi Gun with the opposite power. i.e. Use the stock Medi Gun with the Kritz canteen and use the Kritzkrieg with the Uber Canteen.

Sniper

• Giants move slower making their already enormous heads inviting targets but they won't be on hit killed like smaller ones.

Spy

• Unique to Mann vs Machine the Spy's Sapper can be placed to disable robots. Unlike conventional gameplay there's a meter that must be left to fill before they can be used again.
• Use your disguise to pick up money that is too dangerous for your teammates to retrieve.