Games like XO
Games like XO include STAR WARS™ Knights of the Old Republic™, STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™, FTL: Faster Than Light, Beholder, and Mass Effect™ Legendary Edition. We matched them by the tags players give XO on Steam (Early Access, Real-Time with Pause, Roguelite, RTS, and Story Rich): closest matches first, and among equally close ones the better-known games.

STAR WARS™ Knights of the Old Republic™
Shared: Story Rich · Real-Time with Pause · Sci-fi

STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™
Shared: Story Rich · Real-Time with Pause · Sci-fi

FTL: Faster Than Light
Shared: Real-Time with Pause · Sci-fi · Perma Death

Beholder
Shared: Choices Matter · Story Rich · Dystopian

Mass Effect™ Legendary Edition
Shared: Story Rich · Choices Matter · Sci-fi

Hades
Shared: Roguelite · Story Rich · Indie

Griftlands
Shared: Roguelite · Choices Matter · Story Rich

Dragon Age: Origins - Ultimate Edition
Shared: Story Rich · Real-Time with Pause · Choices Matter

Original War
Shared: RTS · Real-Time with Pause · Sci-fi

Crying Suns
Shared: Roguelite · Real-Time with Pause · Sci-fi

Detroit: Become Human
Shared: Story Rich · Choices Matter · Sci-fi

Void War
Shared: Roguelite · Choices Matter · Real-Time with Pause

We Who Are About To Die
Shared: Roguelite · Early Access · Action

Undertale
Shared: Story Rich · Choices Matter · Singleplayer

Mass Effect (2007)
Shared: Story Rich · Sci-fi · Choices Matter

Creeper World 3: Arc Eternal
Shared: RTS · Real-Time with Pause · Sci-fi

Battlestar Galactica: Scattered Hopes
Shared: Roguelite · RTS · Story Rich

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

Hades II
Shared: Roguelite · Story Rich · Action

Hero of Fate
Shared: Real-Time with Pause · RTS · Roguelite

Half-Life 2
Shared: Story Rich · Sci-fi · Action

Baldur's Gate 3
Shared: Story Rich · Choices Matter · RPG

This War of Mine
Shared: Choices Matter · Singleplayer · Survival

Dispatch
Shared: Story Rich · Choices Matter · Singleplayer