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X-COM: UFO Defense
幽浮：UFO防御
X-COM: UFO Defense is a turn-based strategy game developed by Microprose and released in 1994 for DOS. Players command an international military organization defending Earth from alien invasions. The game combines tactical squad-based combat with strategic base management—researching alien technology, constructing facilities, managing personnel, and manufacturing equipment between missions. Tactical gameplay involves positioning units on procedurally-varied maps where line of sight, cover, and action points determine outcomes. The single-player campaign escalates in difficulty as alien forces grow stronger. Combat emphasizes protective positioning and resource management, with permanent consequences for losing soldiers. Players operate across a global map, intercepting UFOs and responding to alien incursions across diverse terrains including forests, urban areas, and deserts.
- Developer
- Mythos Games
- Released
- 1994
- Platform
- DOS
- Genre
- Strategy
- Players
- 1P
- Rating
- 4.5 / 5 (2.1K)
- Last updated
X-COM: UFO Defense Controls — DOS Keyboard Keys
Default keyboard bindings for X-COM: UFO Defense on our in-browser DOS emulator. Plug in a USB or Bluetooth gamepad to auto-detect mappings, or rebind any key from the emulator settings menu.
DOS games use the keyboard directly as the controller — there is no console-button mapping. Open the in-game documentation or check the game-specific options screen for the key layout used by this title.
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
X-COM: UFO Defense Longplay & Gameplay Videos
Watch a full playthrough of X-COM: UFO Defense on DOS before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"X-COM: UFO Defense" DOS longplay 1994
External references
Frequently Asked Questions
When was X-COM: UFO Defense released?
X-COM: UFO Defense was released in 1994 for the DOS.
Who developed X-COM: UFO Defense?
X-COM: UFO Defense was developed by Mythos Games, available to play in your browser on RetroGameSpace.
How many players does X-COM: UFO Defense support?
X-COM: UFO Defense is a single-player Strategy game for the DOS.
What type of game is X-COM: UFO Defense?
X-COM: UFO Defense is a Strategy game for the DOS, playable instantly in your browser — no downloads, no installs.
How can I play X-COM: UFO Defense for free?
Open this page and click "Play Now" — X-COM: UFO Defense runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play X-COM: UFO Defense in the browser?
No. X-COM: UFO Defense streams from a public archive into a browser-side DOS emulator. Nothing is installed on your computer.
Can I save my progress in X-COM: UFO Defense?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original DOS cartridge supported.
Does X-COM: UFO Defense work on mobile devices?
Yes — the DOS emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play X-COM: UFO Defense this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of X-COM: UFO Defense. Game files are fetched on demand from publicly-accessible archives. You are responsible for compliance with your local laws and the bring-your-own-ROM principle.
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