Like more than one of them
24 games close to two or more of Space Run, 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
Sanctum 2
Space Run, but a first-person shooter, and co-op
Loved · 90%Tower Defense · Sci-fiAlso like Garry's Mod and Left 4 Dead 2
Sanctum
Space Run, but a first-person shooter, and co-op
Liked · 89%Tower Defense · Sci-fiAlso like Garry's Mod and Left 4 Dead 2
Bloons TD5
Space Run, but 2D, and even better loved
Loved · 95%Tower Defense · StrategyAlso like Garry's Mod
Plants vs. Zombies: Game of the Year
Space Run, but with zombies, and funny
Loved · 98%Tower Defense · StrategyAlso like Left 4 Dead 2
Orcs Must Die! 2
Space Run, but a third-person shooter, and third-person
Loved · 92%Tower Defense · StrategyAlso like Garry's Mod
Star Wars: Battlefront 2 (Classic, 2005)
Space Run, but a third-person shooter, and even better loved
Loved · 95%Space · Sci-fiAlso like Left 4 Dead 2
STAR WARS Battlefront II
Garry's Mod, but a third-person shooter, and a quarter of the hours
Liked · 88%FPS · ShooterAlso like Left 4 Dead 2
Spaceflight Simulator
Space Run, but a space sim, and with crafting
Loved · 97%Spaceships · SpaceAlso like Garry's Mod
PlanetSide 2
Garry's Mod, but free to play, and an MMO
Liked · 80%FPS · ShooterAlso like Left 4 Dead 2
Wildgate
Space Run, but an extraction shooter, and PvP
Mixed · 76%Spaceships · SpaceAlso like Garry's Mod and Left 4 Dead 2
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
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
7 Days to Die
Garry's Mod, but a base builder, and about survival
Liked · 87%Building · SandboxAlso like Left 4 Dead 2
Gratuitous Space Battles
Space Run, but top-down, and more divisive
Mixed · 70%Spaceships · SpaceAlso like Garry's Mod
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
Yet Another Zombie Defense
Left 4 Dead 2, but a tower defense game, and a tenth of the hours
Liked · 87%Zombies · SurvivalAlso like Space Run
Evolve Stage 2
Left 4 Dead 2, but free to play, and sci-fi
Mixed · 70%FPS · Team-BasedAlso like Garry's Mod
Mindustry
Space Run, but an automation game, and with base building
Loved · 96%Tower Defense · StrategyAlso like Garry's Mod
Space Hulk: Deathwing - Enhanced Edition
Garry's Mod, but a tenth of the hours, and more divisive
Mixed · 72%FPS · Online Co-OpAlso like Left 4 Dead 2
More like Space Run
3 games closest to Space Run of your picks
Cosmoteer: Starship Architect & Commander
Space Run, but a space sim, and twice the hours
Loved · 94%Space · Spaceships
More like Garry's Mod
3 games closest to Garry's Mod of your picks
Space Engineers
Garry's Mod, but a survival crafting game, and with base building
Liked · 89%Building · Sandbox
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · 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.