Games like X-COM: UFO Defense
Games like X-COM: UFO Defense include XCOM: Enemy Unknown, XCOM®: Chimera Squad, STAR WARS Zero Company™, BattleTech, and X-COM: Terror From the Deep. We matched them by the tags players give X-COM: UFO Defense on Steam (Strategy, Classic, Turn-Based Strategy, Sci-fi, and Aliens): closest matches first, and among equally close ones the better-known games.

XCOM: Enemy Unknown
Shared: Strategy · Turn-Based Strategy · Sci-fi

XCOM®: Chimera Squad
Shared: Strategy · Turn-Based Strategy · Turn-Based

STAR WARS Zero Company™
Shared: Turn-Based Strategy · Strategy · Sci-fi

BattleTech
Shared: Strategy · Sci-fi · Turn-Based Strategy

X-COM: Terror From the Deep
Shared: Strategy · Turn-Based Strategy · Classic

XCOM 2
Shared: Strategy · Tactical · Sci-fi

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Turn-Based Strategy · Sci-fi

X-COM: Apocalypse
Shared: Strategy · Sci-fi · Classic

Warhammer 40,000: Mechanicus
Shared: Strategy · Sci-fi · Turn-Based

Sid Meier's Civilization® V
Shared: Strategy · Turn-Based Strategy · Turn-Based

Sid Meier’s Civilization® VI
Shared: Strategy · Turn-Based Strategy · Turn-Based

Into the Breach
Shared: Strategy · Turn-Based Strategy · Turn-Based

Warhammer 40,000: Battlesector
Shared: Strategy · Turn-Based Strategy · Sci-fi

Jagged Alliance 3
Shared: Strategy · Turn-Based Strategy · Tactical

Gears Tactics
Shared: Strategy · Turn-Based · Tactical

Xenonauts
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

The Last Spell
Shared: Strategy · Turn-Based Strategy · Tactical

MENACE
Shared: Strategy · Turn-Based Strategy · Tactical

Fallout Tactics: Brotherhood of Steel
Shared: Strategy · Turn-Based · Classic

Heroes® of Might & Magic® III - HD Edition
Shared: Strategy · Classic · Turn-Based Strategy

Half-Life
Shared: Classic · Sci-fi · Singleplayer

Battle Brothers
Shared: Strategy · Turn-Based Strategy · Tactical

Sid Meier's Civilization® III Complete
Shared: Strategy · Turn-Based Strategy · Classic

Total War: ROME II - Emperor Edition
Shared: Strategy · Turn-Based Strategy · Tactical