Games like Space Break
Games like Space Break include Kerbal Space Program, Plague Inc: Evolved, FTL: Faster Than Light, Garry's Mod, and Space Engineers. We matched them by the tags players give Space Break on Steam (Indie, Casual, Simulation, Building, and Tactical): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Space · Building

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

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

Garry's Mod
Shared: Building · Casual · Simulation

Space Engineers
Shared: Building · Simulation · Space

Cosmoteer: Starship Architect & Commander
Shared: Building · Indie · Space

House Flipper
Shared: Simulation · Building · Casual

Dyson Sphere Program
Shared: Building · Space · Simulation

Mountain
Shared: Indie · Simulation · Casual

Mini Motorways
Shared: Casual · Simulation · Indie

Two Point Hospital
Shared: Simulation · Building · Indie

Angels Fall First
Shared: Indie · Simulation · Space

SpaceEngine
Shared: Casual · Space · Sci-fi

Game Dev Tycoon
Shared: Indie · Simulation · Casual

911 Operator
Shared: Simulation · Indie · Casual

Spacebase DF-9
Shared: Simulation · Indie · Space

Paralives
Shared: Simulation · Indie · Building

STAR WARS™ Battlefront™ II
Shared: Space · Shooter · Sci-fi

Empyrion - Galactic Survival
Shared: Simulation · Space · Building

House of the Dying Sun
Shared: Simulation · Indie · Space

Oxygen Not Included
Shared: Building · Simulation · Indie

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

Cities: Skylines
Shared: Simulation · Building · Singleplayer

Townscaper
Shared: Building · Casual · Simulation

