Games like Titan Outpost
Games like Titan Outpost include Baldur's Gate 3, Warhammer 40,000: Rogue Trader, Mass Effect™ Legendary Edition, Starfield, and Oxygen Not Included. We matched them by the tags players give Titan Outpost on Steam (RPG, Indie, Simulation, Adventure, and Space): closest matches first, and among equally close ones the better-known games.

Baldur's Gate 3
Shared: RPG · Adventure · CRPG

Warhammer 40,000: Rogue Trader
Shared: RPG · CRPG · Choices Matter

Mass Effect™ Legendary Edition
Shared: RPG · Sci-fi · Space

Starfield
Shared: RPG · Space · Sci-fi

Oxygen Not Included
Shared: Base Building · Colony Sim · Simulation

RimWorld
Shared: Base Building · Colony Sim · Simulation

STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™
Shared: RPG · Sci-fi · Adventure

STAR WARS™ Knights of the Old Republic™
Shared: RPG · Sci-fi · Adventure

Mass Effect (2007)
Shared: RPG · Sci-fi · Space

Space Haven
Shared: Space · Simulation · Base Building

Deliver Us The Moon
Shared: Indie · Adventure · Space

Rebel Galaxy
Shared: RPG · Space · Sci-fi

The Long Journey Home
Shared: RPG · Simulation · Indie

Between the Stars
Shared: RPG · Space · Simulation

Endless Sky
Shared: Space · Simulation · Sci-fi

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Story Rich

Disco Elysium - The Final Cut
Shared: RPG · Story Rich · Choices Matter

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

Planetbase
Shared: Space · Simulation · Colony Sim

Outer Wilds
Shared: Space · Adventure · Indie

Home Behind 2
Shared: RPG · Adventure · Indie

Space Rangers HD: A War Apart
Shared: RPG · Space · Adventure

Spacebase DF-9
Shared: Simulation · Space · Indie

Sultan's Game
Shared: RPG · Simulation · Adventure