Games like X-COM: Apocalypse
Games like X-COM: Apocalypse include XCOM: Enemy Unknown, XCOM®: Chimera Squad, X-COM: UFO Defense, STAR WARS Zero Company™, and XCOM 2. We matched them by the tags players give X-COM: Apocalypse on Steam (Strategy, Sci-fi, Turn-Based, Tactical, and Aliens): closest matches first, and among equally close ones the better-known games.

XCOM: Enemy Unknown
Shared: Strategy · Sci-fi · Tactical

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

X-COM: UFO Defense
Shared: Strategy · Sci-fi · Classic

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

XCOM 2
Shared: Strategy · Tactical · Sci-fi

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

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

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

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

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

Shadowrun Returns
Shared: Turn-Based · Sci-fi · Strategy

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

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

Gears Tactics
Shared: Strategy · Turn-Based · Tactical

Shadowrun: Dragonfall - Director's Cut
Shared: Turn-Based · Strategy · Sci-fi

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

Wasteland 2: Director's Cut
Shared: Strategy · Turn-Based · Tactical

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

Xenonauts
Shared: Strategy · Turn-Based Strategy · Tactical

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

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

Gorky 17
Shared: Strategy · Turn-Based · Classic

Fallout: A Post Nuclear Role Playing Game
Shared: Turn-Based · Classic · Sci-fi

MENACE
Shared: Strategy · Tactical · Turn-Based Strategy