XCOM Games for Windows — Series Overview

The XCOM series spans classic global-defense strategy, modern tactical reboots, expansion campaigns and a squad-focused spin-off. Choose the game that matches your preferred pace and level of strategy.

Quick answer: For a modern introduction, XCOM: Enemy Unknown or XCOM 2 are common starting points. UFO Defense is the classic experience, Enemy Within expands Enemy Unknown, and Chimera Squad follows a different format.

Classic X-COM: UFO Defense

The original strategy loop features UFO interception, global defense, tactical operations and research. It is best approached as a classic game with older interface conventions.

Enemy Unknown and Enemy Within

Enemy Unknown reintroduces squad-based tactical combat for a modern audience. Enemy Within builds on those foundations with more systems and combat options.

XCOM 2 and War of the Chosen

XCOM 2 shifts the story to a resistance against alien occupation. War of the Chosen adds factions, recurring enemies and new campaign systems to that game.

Chimera Squad and The Bureau

Chimera Squad offers smaller-scale turn-based operations and a distinct turn order. The Bureau is a third-person tactical shooter and should not be confused with the primary turn-based games.

Frequently asked question

What order should I play XCOM games on Windows?

There is no required order for every release. Enemy Unknown, followed by Enemy Within or XCOM 2, is an accessible modern starting route.

Sources and related Windows guides

2K Newsroom: XCOM Ultimate Collection

All Windows guides · Best XCOM games · XCOM 2 · Chimera Squad

Editorial note: This article summarizes published game information and does not claim hands-on testing of every Windows configuration. Updated October 21, 2026.