Games like Rikki Kuu
Games like Rikki Kuu include HELLDIVERS™ 2, Avorion, Kerbal Space Program, Space Engineers, and SimplePlanes. We matched them by the tags players give Rikki Kuu on Steam (Flight, Combat Racing, Third-Person Shooter, Building, and Space): closest matches first, and among equally close ones the better-known games.

HELLDIVERS™ 2
Shared: Third-Person Shooter · PvE · Shooter

Avorion
Shared: Building · Flight · Space

Kerbal Space Program
Shared: Space · Physics · Building

Space Engineers
Shared: Building · Space · Physics

SimplePlanes
Shared: Flight · Building · Physics

Galaxy on Fire 2™ Full HD
Shared: Third-Person Shooter · Space · Space Sim

The Callisto Protocol™
Shared: Third-Person Shooter · Space · Shooter

Warhammer 40,000: Space Marine 2
Shared: Third-Person Shooter · PvE · Action

Besiege
Shared: Physics · Building · PvE

Sprocket
Shared: Building · Third-Person Shooter · Physics

Nuclear Option
Shared: Flight · Physics · Simulation

Kerbal Space Program 2
Shared: Space · Building · Physics

STAR WARS™ Battlefront™ II
Shared: Third-Person Shooter · Space · Shooter

Trailmakers
Shared: Space · Flight · Building

Empyrion - Galactic Survival
Shared: Space · Building · Simulation

SpaceBourne 2
Shared: Flight · Space Sim · Space

Warframe
Shared: Third-Person Shooter · Action · PvE

Dyson Sphere Program
Shared: Space · Building · Simulation

ARC Raiders
Shared: Third-Person Shooter · PvE · Shooter

Aviassembly
Shared: Flight · Building · Physics

STAR WARS™: Squadrons
Shared: Flight · Space · Action

Hardspace: Shipbreaker
Shared: Space · Physics · Simulation

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Third-Person Shooter · Space · Shooter

Flyout
Shared: Flight · Building · Physics