Games like Cleanup Gone Wrong
Games like Cleanup Gone Wrong include How to Fish, Garry's Mod, MechWarrior 5: Mercenaries, Left 4 Dead 2, and Arma 3. We matched them by the tags players give Cleanup Gone Wrong on Steam (Casual, Simulation, Action, Arcade, and Shooter): closest matches first, and among equally close ones the better-known games.

How to Fish
Shared: Co-op · Online Co-Op · Shooter

Garry's Mod
Shared: Casual · Simulation · Singleplayer

MechWarrior 5: Mercenaries
Shared: Simulation · Action · Shooter

Left 4 Dead 2
Shared: Co-op · Shooter · Action

Arma 3
Shared: Action · Simulation · Shooter

PAYDAY 2
Shared: Action · Co-op · Online Co-Op

KovaaK's
Shared: Action · Simulation · Shooter

Aimlabs
Shared: Simulation · Action · Shooter

Starship Troopers: Extermination
Shared: Action · Online Co-Op · Co-op

Call of Duty®
Shared: Action · Shooter · Singleplayer

PowerWash Simulator
Shared: Casual · Simulation · 3D

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS

Blood and Bacon
Shared: Action · Shooter · Co-op

Borderlands 2
Shared: Action · Shooter · Co-op

Liars Bar
Shared: Casual · Co-op · Online Co-Op

Battlefield™ 2042
Shared: Shooter · Action · FPS

Goat Simulator
Shared: Simulation · Casual · Action

Call of Duty®: Modern Warfare® 3 (2011)
Shared: Action · Shooter · FPS

Ready or Not
Shared: Shooter · Co-op · Action

Call of Duty®: Modern Warfare® 2 (2009)
Shared: Action · Shooter · FPS

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Singleplayer

Gang Beasts
Shared: Action · Casual · Co-op

Call of Duty®: Black Ops III
Shared: Action · Shooter · Co-op

Far Cry® 4
Shared: Action · Co-op · Shooter