Like more than one of them
24 games close to two or more of Killsquad, Left 4 Dead 2 and Garry's Mod
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso like Garry's Mod
SAS: Zombie Assault 4
Killsquad, but with zombies, and 2D
Liked · 86%Top-Down Shooter · Top-DownAlso like Left 4 Dead 2
No More Room in Hell
Left 4 Dead 2, but free to play, and half the hours
Loved · 90%Zombies · SurvivalAlso like Garry's Mod
Borderlands: The Pre-Sequel
Garry's Mod, but a looter shooter, and an action RPG
Mixed · 79%FPS · ComedyAlso like Killsquad and Left 4 Dead 2
Borderlands 2
Garry's Mod, but a looter shooter, and loot-driven
Loved · 90%FPS · ShooterAlso like Killsquad
R.E.P.O.
Garry's Mod, but a survival horror game, and a quarter of the hours
Loved · 96%Physics · ComedyAlso like Left 4 Dead 2
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
GROUND BRANCH
Garry's Mod, but military, and a quarter of the hours
Liked · 84%FPS · ShooterAlso like Left 4 Dead 2
Space Hulk: Deathwing - Enhanced Edition
Garry's Mod, but a tenth of the hours, and more divisive
Mixed · 72%FPS · Online Co-OpAlso like Killsquad and Left 4 Dead 2
Zombie Panic! Source
Left 4 Dead 2, but half the hours, and more divisive
Liked · 85%Zombies · FPSAlso like Garry's Mod
Far Cry 4
Garry's Mod, but open world, and half the hours
Liked · 85%FPS · SandboxAlso like Left 4 Dead 2
Dead Island: Epidemic
Killsquad, but free to play, and a MOBA
Liked · 82%Top-Down Shooter · Hack and SlashAlso like Left 4 Dead 2
Dead Effect 2
Left 4 Dead 2, but an action RPG, and a third of the hours
Mixed · 73%Zombies · FPSAlso like Garry's Mod and Killsquad
Content Warning
Garry's Mod, but a horror game, and procedurally generated
Loved · 94%Physics · Online Co-OpAlso like Left 4 Dead 2
Call of Duty: Black Ops II
Left 4 Dead 2, but a quarter of the hours
Liked · 86%FPS · Team-BasedAlso like Garry's Mod
Call of Duty: World at War
Left 4 Dead 2, but set in World War II
Loved · 92%Zombies · FPSAlso like Garry's Mod
Gunfire Reborn
Garry's Mod, but an action roguelike, and half the hours
Loved · 93%FPS · Online Co-OpAlso like Killsquad
Warface: Clutch
Garry's Mod, but free to play, and a quarter of the hours
Mixed · 66%FPS · ShooterAlso like Left 4 Dead 2
More like Killsquad
2 games closest to Killsquad of your picks
HELLDIVERS
Killsquad, but couch co-op, and three times the hours
Loved · 90%Top-Down Shooter · Twin Stick Shooter
More like Left 4 Dead 2
1 games closest to Left 4 Dead 2 of your picks
Cry of Fear
Left 4 Dead 2, but a psychological horror game, and a third of the hours
Liked · 89%Zombies · Survival Horror
More like Garry's Mod
3 games closest to Garry's Mod of your picks
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · Physics
Hot Dogs, Horseshoes & Hand Grenades
Garry's Mod, but in VR, and single-player
Loved · 97%Physics · Sandbox
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.