Like more than one of them
21 games close to two or more of Maize, Garry's Mod and Left 4 Dead 2
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso like Garry's Mod
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
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
35MM
Maize, but a first-person shooter, and a survival horror game
Mixed · 71%Hidden Object · Walking SimulatorAlso like Left 4 Dead 2
Lunch Lady
Maize, but a survival horror game, and co-op
Liked · 85%Collectathon · Walking SimulatorAlso like Left 4 Dead 2
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso 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
Serious Sam 2
Garry's Mod, but a boomer shooter, and a tenth of the hours
Loved · 90%FPS · ComedyAlso like Left 4 Dead 2
Content Warning
Garry's Mod, but a horror game, and procedurally generated
Loved · 94%Physics · Online Co-OpAlso like Left 4 Dead 2
Halo: The Master Chief Collection
Garry's Mod, but story-rich, and a third of the hours
Loved · 92%FPS · ShooterAlso like Left 4 Dead 2
Only If
Maize, but free to play, and a horror game
Divisive · 62%Walking Simulator · SurrealAlso like Left 4 Dead 2
Fallout 3 - Game of the Year Edition
Garry's Mod, but an action RPG, and post-apocalyptic
Liked · 82%Sandbox · FPSAlso like Left 4 Dead 2
Bang-On Balls: Chronicles
Garry's Mod, but a 3D platformer, and couch co-op
Loved · 96%Sandbox · PhysicsAlso like Maize
Zombie Panic! Source
Left 4 Dead 2, but half the hours, and more divisive
Liked · 85%Zombies · FPSAlso like Garry's Mod
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Maize, but a survival game, and six times the hours
Liked · 80%Lore-Rich · ExplorationAlso like Left 4 Dead 2
More like Garry's Mod
8 games closest to Garry's Mod of your picks
Fireworks Mania - An Explosive Simulator
Garry's Mod, but a hobby sim, and a tenth of the hours
Loved · 97%Sandbox · Physics
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 half the hours
Loved · 97%Physics · Sandbox
More like Left 4 Dead 2
1 games closest to Left 4 Dead 2 of your picks
Inside the Backrooms
Left 4 Dead 2, but a psychological horror game, and a puzzle game
Liked · 80%Survival Horror · Online Co-Op
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.