|Maximum possible credits:||5350|
|Minimum respawn wave time:||7|
|Maximum respawn wave time:||Unknown|
|Fixed respawn time:||No|
|Sentry Buster spawn time:||0 seconds|
|Sentry Buster respawn time:||30 seconds|
Mannslaughter is one of the hardest missions in the game (despite having only 5 waves) and must be approached with the right strategy. A good setup for this mission is to have 4 Heavies, 1 Scout, and 1 Engineer (or 3 Heavies and a Demoman), with one person (usually a Heavy) occasionally switching to Pyro.
The first wave is a pure DPS test with 28 Steel Gauntlets and 7 Giant Demomen to destroy. Even unupgraded, a Minigun is, outside of backstabs, the best way to defeat these tough Heavy robots. Don't let them reach the second buff stage or they'll become very hard to kill. Keep an eye on the Sydney Sniper robots, as their Jarate debuff can turn even a Heavy into a glass cannon.
The second wave pits the mercenaries against huge swarms of crit-boosted melee Scout robots. A well-placed Sentry Gun will quickly take care of them. Giant Charged Soldiers come in later with Quick-Fix Medics healing more melee Scouts. Buying Crit resistance and/or Destroy Projectile upgrades helps immensely here.
The third wave is maybe one of the hardest waves among official Mann vs. Machine missions, testing the team's ability to multitask. It begins with three pairs of Super Scouts coming from both entrances; bodyblocking, sentryblocking and Mad Milk's slowdown must be combined to destroy the Super Scouts. The second part is much trickier: it mixes up Tanks, Super Scouts and small support of Soldiers and Pyros. A Pyro equipped with the Phlogistinator can destroy the Tanks alone, allowing the rest of the team to focus on the robots. The last part includes eight Giant Heavies, each healed by three Über Medics, all supported by small groups of melee Scouts. A Scout or a Spy can harass the Giants, drawing their attention and allowing his teammates to take them down faster.
The fourth wave introduces the Deflector Heavy, which can destroy projectiles such as rockets and grenades, much like its Giant counterpart. Attacking from the sides or from behind is recommended for projectile-based classes.
Similarly to the first wave, the final wave includes Sydney Sniper robots and brings in more Deflector Heavies. Destroying the four Tanks requires full contribution from the whole team. Consider having the Scout and another Heavy change to Pyros for easier Tank-Killing (as an added bonus, fire can't be deflected by the Deflector Heavies).
- In wave 4 of this mission, the wave display infobox incorrectly lists the number of Über Medics as being 13 when there are 15 Über Medics in the wave.
- According to unused code, a Jarate Thrower robot template would have been used for the mission but this was never implemented.