Like more than one of them
23 games close to two or more of That's not my Neighbor, 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
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
BIGFOOT
Left 4 Dead 2, but PvP, and a third of the hours
Liked · 82%Survival Horror · FPSAlso like Garry's Mod and That's not my Neighbor
Deceit
Left 4 Dead 2, but a social deduction game, and your choices matter
Mixed · 79%Zombies · FPSAlso like That's not my Neighbor and Garry's Mod
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Zombie Panic! Source
Left 4 Dead 2, but half the hours, and more divisive
Liked · 85%Zombies · FPSAlso like Garry's Mod
Secret Neighbor
That's not my Neighbor, but a social deduction game, and twice the hours
Liked · 85%Horror · ThrillerAlso like Garry's Mod and Left 4 Dead 2
Ravenfield
Garry's Mod, but military, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
Content Warning
Garry's Mod, but a horror game, and a tenth of the hours
Loved · 94%Physics · Online Co-OpAlso like Left 4 Dead 2
Insurgency: Sandstorm
Garry's Mod, but half the hours, and more divisive
Liked · 85%FPS · ShooterAlso like Left 4 Dead 2
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
Inside the Backrooms
Left 4 Dead 2, but a puzzle game, and a psychological horror game
Liked · 80%Survival Horror · Online Co-OpAlso like That's not my Neighbor
Choo-Choo Charles
That's not my Neighbor, but open world, and 3D
Loved · 91%Horror · ThrillerAlso like 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
Backrooms: Escape Together
That's not my Neighbor, but co-op, and realistic
Liked · 89%Horror · Psychological HorrorAlso like Left 4 Dead 2
Bodycam
Garry's Mod, but horror, and a tenth of the hours
Liked · 81%FPS · PhysicsAlso like Left 4 Dead 2
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod
DEVOUR
Left 4 Dead 2, but psychological horror, and a third of the hours
Loved · 90%Online Co-Op · Survival HorrorAlso like That's not my Neighbor
More like That's not my Neighbor
1 games closest to That's not my Neighbor of your picks
More like Left 4 Dead 2
2 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
Dead Island Definitive Edition
Left 4 Dead 2, but an action RPG, and open world
Liked · 82%Zombies · Survival
More like Garry's Mod
4 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
Fireworks Mania - An Explosive Simulator
Garry's Mod, but a hobby sim, and 3D
Loved · 97%Sandbox · Physics
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.