Like more than one of them
20 games close to two or more of Sea of Solitude, 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
PEAK
Garry's Mod, but a 3D platformer, and a survival game
Loved · 94%Physics · Online Co-OpAlso like Sea of Solitude
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
Tiny and Big: Grandpa's Leftovers
Sea of Solitude, but a puzzle platformer, and third-person
Loved · 92%Platformer · 3D PlatformerAlso 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
Biped
Sea of Solitude, but a puzzle platformer, and co-op
Liked · 85%3D Platformer · PhysicsAlso like Garry's Mod
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
BONEWORKS
Garry's Mod, but in VR, and full of puzzles
Loved · 92%Physics · SandboxAlso like Sea of Solitude
Totally Accurate Battlegrounds
Garry's Mod, but free to play, and a battle royale
Liked · 88%Physics · SandboxAlso 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
Portal
Sea of Solitude, but a puzzle game, and first-person
Loved · 99%3D Platformer · PlatformerAlso like Garry's Mod
Bodycam
Garry's Mod, but a tenth of the hours, and more divisive
Liked · 81%FPS · PhysicsAlso like 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
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
Super Bunny Man
Garry's Mod, but a platformer, and a party game
Liked · 85%Sandbox · PhysicsAlso like Sea of Solitude
More like Sea of Solitude
1 games closest to Sea of Solitude of your picks
Portal 2
Sea of Solitude, but full of puzzles, and three times the hours
Loved · 99%Platformer · 3D Platformer
More like Garry's Mod
8 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 a tenth of the hours
Loved · 97%Sandbox · 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
Cry of Fear
Left 4 Dead 2, but a psychological horror game, and a third of the hours
Liked · 89%Zombies · Survival Horror
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.