Like more than one of them
30 games close to two or more of Half dead, Left 4 Dead 2 and Garry's Mod
SCP: Secret Laboratory
Half dead, but free to play, and a first-person shooter
Loved · 91%Survival · HorrorAlso like Left 4 Dead 2 and Garry's Mod
Killing Floor 2
Much the same as Left 4 Dead 2
Liked · 88%Zombies · FPSAlso like Half dead and Garry's Mod
Back 4 Blood
Left 4 Dead 2, but more divisive
Mixed · 69%Zombies · FPSAlso like Half dead and Garry's Mod
GTFO
Left 4 Dead 2, but harder, and half the hours
Liked · 84%FPS · ZombiesAlso like Half dead and Garry's Mod
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · PhysicsAlso like Half dead
DEVOUR
Half dead, but psychological horror, and four times the hours
Loved · 90%Survival · HorrorAlso like Left 4 Dead 2
Zombie Panic! Source
Left 4 Dead 2, but free to play, and half the hours
Liked · 85%Zombies · FPSAlso like Half dead and Garry's Mod
R.E.P.O.
Half dead, but funny, and nine times the hours
Loved · 96%Survival · HorrorAlso like Garry's Mod and Left 4 Dead 2
State of Decay 2
Left 4 Dead 2, but a base builder, and open world
Liked · 83%Zombies · SurvivalAlso like Half dead
Dying Light
Left 4 Dead 2, but with parkour, and open world
Loved · 95%Zombies · Survival HorrorAlso like Half dead
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod and Half dead
Propagation VR
Left 4 Dead 2, but in VR, and a tenth of the hours
Loved · 94%Zombies · FPSAlso like Half dead
Call of Duty: Black Ops II
Left 4 Dead 2, but a quarter of the hours, and more divisive
Liked · 86%FPS · Team-BasedAlso like Half dead and Garry's Mod
Synergy
Half dead, but free to play, and five times the hours
Liked · 89%Co-op · SurvivalAlso like Left 4 Dead 2 and Garry's Mod
Inside the Backrooms
Half dead, but a psychological horror game, and four times the hours
Liked · 80%Puzzle · HorrorAlso like Left 4 Dead 2
Backrooms: Escape Together
Half dead, but psychological horror, and realistic
Liked · 89%Horror · Co-opAlso like Left 4 Dead 2
Evolve Stage 2
Left 4 Dead 2, but free to play, and sci-fi
Mixed · 70%FPS · Team-BasedAlso like Half dead and Garry's Mod
Dead Island Riptide Definitive Edition
Half dead, but an action RPG, and with zombies
Mixed · 71%Survival · Co-opAlso like Left 4 Dead 2
Dead Rising 2: Off the Record
Half dead, but a hack and slash game, and eight times the hours
Mixed · 77%Co-op · SurvivalAlso like Left 4 Dead 2 and Garry's Mod
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod and Half dead
Far Cry 4
Garry's Mod, but open world, and half the hours
Liked · 85%FPS · SandboxAlso like Half dead and Left 4 Dead 2
Call of Duty: World at War
Left 4 Dead 2, but set in World War II
Loved · 92%Zombies · FPSAlso like Garry's Mod and Half dead
Dead Rising 3
Half dead, but a hack and slash game, and eight times the hours
Mixed · 77%Survival · Co-opAlso like Left 4 Dead 2 and Garry's Mod
World War Z
Left 4 Dead 2, but more divisive
Liked · 82%Zombies · Online Co-OpAlso like Half dead and Garry's Mod
Depth
Left 4 Dead 2, but underwater, and half the hours
Liked · 88%Team-Based · ShooterAlso like Half dead and Garry's Mod
The Forest
Half dead, but solo, and 11 times the hours
Loved · 96%Survival · HorrorAlso like Left 4 Dead 2
Far Cry 3
Garry's Mod, but stealthy, and a third of the hours
Liked · 88%FPS · SandboxAlso like Half dead and Left 4 Dead 2
Sker Ritual
Half dead, but a first-person shooter, and three times the hours
Liked · 81%Survival · Co-opAlso like Left 4 Dead 2 and Garry's Mod
Project Zomboid
Left 4 Dead 2, but a survival crafting game, and twice the hours
Loved · 94%Zombies · SurvivalAlso like Half dead
Subnautica 2
Half dead, but underwater, and seven times the hours
Loved · 91%Survival · HorrorAlso like Left 4 Dead 2
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.