September 17, 2014 Patch
- The Nostromo Napalmer was added to the game.
September 25, 2014 Patch
- [Undocumented] Added a kill icon for Nostromo Napalmer.
October 30, 2014 Patch
- [Undocumented] Removed promo restrictions on Nostromo Napalmer.
December 8, 2014 Patch (End of the Line Update)
- [Undocumented] Added killstreak and crit glow support to Nostromo Napalmer.
December 17, 2015 Patch (Tough Break Update)
- The base Flamethrower's damage fall off over distance has been decreased, resulting in higher damage output at range.
- Extinguishing a teammate will now return 20 health to the Pyro.
January 7, 2016 Patch
- Changed attribute:
- [Undocumented] Updated 20 health restoration when used to extinguish a burning teammate from neutral attribute to positive attribute.
January 20, 2016 Patch
- Fixed the Nostromo Napalmer drawing the flamethrower pilot light by mistake.
July 7, 2016 Patch (Meet Your Match Update)
- Added: Direct damage reduces Medi Gun healing and resist shield effects by 25%
- Medics hear a "healing interrupted" sound when this is happening to their heal target.
October 20, 2017 Patch (Jungle Inferno Update)
- Flamethrowers no longer apply maximum-duration afterburn on contact. Afterburn duration is now based on how long the target is in contact with direct flames.
- Better visual sync, more consistent (no visuals/damage mismatch).
- New particle effects.
- Airblast
- Hit detection for both players and projectiles is now a consistent cone.
- Airblasting players now factors in the momentum of the Pyro and target, giving both more control over the interaction.
- Airblast now causes target player to have reduced footing and air control for a short period.
- Now factors in the upward angle of the airblast, rather than having a fixed upward force.
- Total push force slightly increased.
October 30, 2017 Patch
- Fixed flamethrowers not damaging buildings at close distance.
November 7, 2017 Patch
- Fixed not seeing the new flamethrower effects on some machines.
March 28, 2018 Patch #1
- Flame damage per second now ramps up based on density of flame encountered, up to 200%.
- Initial flame damage per second reduced by 50%, resulting in the max damage being unchanged.
- Fixed Flamethrower particles sometimes failing to draw on the client.
- Fixed Flamethrower flames not colliding with tf_generic_bomb entities.
March 28, 2018 Patch #2
- Fixed a server crash related to the Flamethrower.