Games like After the Crash : Colony
Games like After the Crash : Colony include Stellaris, X4: Foundations, No Man's Sky, Elite Dangerous, and Empyrion - Galactic Survival. We matched them by the tags players give After the Crash : Colony on Steam (Space Sim, Strategy, Simulation, 4X, and Survival): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · 4X

X4: Foundations
Shared: Simulation · Space Sim · Space

No Man's Sky
Shared: Space · Survival · Sci-fi

Elite Dangerous
Shared: Space Sim · Space · Simulation

Empyrion - Galactic Survival
Shared: Simulation · Space · Survival

FTL: Faster Than Light
Shared: Strategy · Space · Sci-fi

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Strategy · Space Sim

Kerbal Space Program
Shared: Simulation · Space Sim · Space

Space Haven
Shared: Strategy · Survival · Simulation

The Alters
Shared: Survival · Strategy · Sci-fi

EVE Online
Shared: Space Sim · Simulation · Exploration

Nimbatus - The Space Drone Constructor
Shared: Strategy · Space Sim · Sci-fi

X Rebirth
Shared: Simulation · Space Sim · Space

Starpoint Gemini Warlords
Shared: Strategy · Space · Simulation

The Long Journey Home
Shared: Strategy · Simulation · Space

Hardspace: Shipbreaker
Shared: Simulation · Space · Sci-fi

This War of Mine
Shared: Survival · Strategy · Simulation

Between the Stars
Shared: Simulation · Space · Strategy

Oxygen Not Included
Shared: Survival · Simulation · Strategy

ENDLESS Space™ - Definitive Edition
Shared: Strategy · 4X · Space

Planetbase
Shared: Strategy · Space · Simulation

The Long Dark
Shared: Survival · Exploration · Simulation

Space Engineers
Shared: Simulation · Survival · Space

RimWorld
Shared: Strategy · Survival · Simulation