Games like IKO 39
Games like IKO 39 include No Man's Sky, Outer Wilds, Hardspace: Shipbreaker, Deliver Us The Moon, and PRAGMATA. We matched them by the tags players give IKO 39 on Steam (Space, Sci-fi, Robots, Physics, and Investigation): closest matches first, and among equally close ones the better-known games.
No Man's Sky
Shared: Space · Sci-fi · Survival
Outer Wilds
Shared: Space · Puzzle · Sci-fi
Hardspace: Shipbreaker
Shared: Space · Sci-fi · Physics
Deliver Us The Moon
Shared: Space · Sci-fi · Puzzle
PRAGMATA
Shared: Sci-fi · Robots · Futuristic
Starfield
Shared: Space · Sci-fi · Singleplayer
The Turing Test
Shared: Sci-fi · Space · Puzzle
Stray
Shared: Robots · Singleplayer · Atmospheric
The Talos Principle
Shared: Sci-fi · Puzzle · Robots
Detroit: Become Human
Shared: Robots · Sci-fi · Futuristic
Breathedge
Shared: Space · Sci-fi · Survival
The Invincible
Shared: Robots · Sci-fi · Futuristic
STAR WARS Jedi: Survivor™
Shared: Sci-fi · Space · Singleplayer
Prey
Shared: Sci-fi · Space · Singleplayer
Cyberpunk 2077
Shared: Sci-fi · Futuristic · Singleplayer
Observation
Shared: Space · Sci-fi · Puzzle
Dead Space (2008)
Shared: Sci-fi · Space · Action
Space Engineers
Shared: Space · Physics · Survival
Portal
Shared: Sci-fi · Puzzle · Physics
The Swapper
Shared: Sci-fi · Space · Puzzle
Half-Life 2
Shared: Sci-fi · Singleplayer · Action
Kerbal Space Program
Shared: Space · Physics · Sci-fi
Call of Duty®: Infinite Warfare
Shared: Space · Futuristic · Sci-fi
COCOON
Shared: Puzzle · Space · Futuristic