Like more than one of them
30 games close to two or more of Happy Room, Left 4 Dead 2 and Garry's Mod
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · PhysicsAlso like Happy Room
Fireworks Mania - An Explosive Simulator
Garry's Mod, but a hobby sim, and a tenth of the hours
Loved · 97%Sandbox · PhysicsAlso like Happy Room
People Playground
Garry's Mod, but single-player, and 2D
Loved · 98%Physics · SandboxAlso like Happy Room
Goat Simulator 3
Garry's Mod, but open world, and a fifth of the hours
Loved · 98%Physics · SandboxAlso like Happy Room
BONEWORKS
Happy Room, but a first-person shooter, and in VR
Loved · 92%Physics · SandboxAlso like Garry's Mod
Crazy Machines 3
Happy Room, but a puzzle game, and a third of the hours
Loved · 95%Physics · SandboxAlso like Garry's Mod
Hot Dogs, Horseshoes & Hand Grenades
Garry's Mod, but in VR, and half the hours
Loved · 97%Physics · SandboxAlso like Happy Room
Totally Accurate Battle Simulator
Happy Room, but an auto battler, and three times the hours
Loved · 98%Sandbox · PhysicsAlso like Garry's Mod
Bad Guys at School
Garry's Mod, but a tenth of the hours
Liked · 87%Sandbox · PhysicsAlso like Happy Room
Just Cause 2
Garry's Mod, but a third-person shooter, and a quarter of the hours
Loved · 91%Sandbox · PhysicsAlso like Happy Room
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Brick Rigs
Garry's Mod, but with destruction, and open world
Loved · 95%Sandbox · PhysicsAlso like Happy Room
Goat Simulator
Happy Room, but open world, and funny
Loved · 91%Physics · SandboxAlso like Garry's Mod
Kerbal Space Program
Garry's Mod, but a space sim, and in space
Loved · 96%Physics · SandboxAlso like Happy Room
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso 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
One-armed cook
Garry's Mod, but free to play, and a cooking game
Loved · 91%Physics · SandboxAlso like Happy Room
Just Cause 3
Garry's Mod, but a third-person shooter, and a third of the hours
Liked · 84%Physics · SandboxAlso like Happy Room
How to Fish
Garry's Mod, but with fishing, and a tenth of the hours
Loved · 95%Physics · Online Co-OpAlso like Left 4 Dead 2
Bum Simulator
Garry's Mod, but a life sim, and about survival
Liked · 88%Sandbox · PhysicsAlso like Happy Room
Bridge Constructor Portal
Happy Room, but full of puzzles, and harder
Loved · 92%Physics · SandboxAlso like Garry's Mod
Unturned
Left 4 Dead 2, but free to play, and a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod
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.