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UFO: Enemy Unknown (1994) Terror from the Deep Apocalypse

XCOM: Enemy Unknown (2012) The Bureau: XCOM Declassified XCOM 2 XCOM: Chimera Squad

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This site is dedicated to X-COM, a computer strategy game series introduced in 1994 by MicroProse.

This wiki contains a wealth of information including strategy, tactical tips, plus an in-depth look at how the game functions. If you love X-COM and want to contribute, please see the Community Portal. All rookies welcome!

Disclaimer: To be absolutely clear, this site is dedicated to a series of computer games and not to general conspiracy theories regarding UFOs and aliens.

X-COM News
Terra Invicta 1.0 released! Terra Invicta Geoscape March 11th, 2026 Terra Invicta, the alien invasion game made by the developers of the Long War mod for Firaxis' XCOM: Enemy Unknown has been officially released in early 2026 after years of early access. With the familiar background story of an alien invasion heading towards Earth, it features eight human playable factions who battle for control of Earth and the entire solar system to determine the destiny of humanity. Phoenix Point Firebird Update! Phoenix Point Firebird Update December 11th, 2025 Five years after its initial releas, the Phoenix Point team led by XCom's original creator, Julian Gollop, has released the Firebird update. Many of the changes and improvements of this free update have been inspired by work done in the Terror From The Void mod, which is a community project made for Phoenix Point, and whose name refers back to the original Terror From The Deep game.
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January 1st, 2018 Maintenance In Progress. In order to improve the wiki's usage, UFOPaedia has been moved to a new server, together with an an upgrade to its MediaWiki software, all thanks to NineX, who has offered to host the wiki. Please reports any bugs you might find in the Talk: Main Page.
Archived News

Enemy Unknown (2012)

XCOM: Enemy Unknown (2012) / Enemy Within DLC Overview Game Information Commander's Briefing Base Location The Council Difficulty Levels Second Wave Achievements Headquarters Mission Control Research Alien Containment Genetics Lab Psionic Labs Engineering Foundry Cybernetics Lab Barracks Officer Training School Hangar Situation Room Gray Market Finances Covert Operations Soldier Classes Assault Heavy Sniper Support Psionic MEC Trooper S.H.I.V. Covert Operative Equipment Armor Weapons Gene Mods Medals Aliens Alien Life Forms Overview of Aliens Alien Stats Alien Deployment UFOs Alien Artifacts Meld EXALT EXALT Soldiers Equipment Missions Mission Types Maps Tables Gameplay Mechanics Chance to Hit Cover Critical Wounds Damage Overwatch Suppression Movement Guides & Tips Strategy Guide Building Optimization Economy Panic Air Combat Story Walkthrough Tactical Squads Class Builds Combat Tactics List of all Abilities Survival Guide XCOM Substack Posts General DLC General Information Elite Soldier Pack Enemy Within Slingshot DLC Operation Slingshot Friends in Low Places Confounding Light Gangplank Shaojie Zhang Progeny Operation Progeny Portent Deluge Furies Annette Durand Multiplayer Multiplayer Multiplayer Tactics Squad Builds Miscellaneous Game Credits Storyline News Ticker Game Universe/Artwork XCOM Heroes Making The Game Harder Glossary of Terms Murphy's Laws (XCOM) Technical Information Patches Bugs Mods & Suggestions Game Editors Game Files Unused Features Wiki Tips

Sequels to Enemy Unknown (2012)

XCOM 2 Overview Game Information Difficulty Levels Achievements XCOM 2: War of the Chosen The Avenger Commander's Quarters Bridge Research Engineering Living Quarters Facilities Proving Ground Advanced Warfare Center Guerrilla Tactics School Psionic Labs Shadow Chamber Resistance Ring (WotC) Soldiers Ranger Grenadier Sharpshooter Specialist Psi Operative SPARK Heroes Arsenal Armor Equipment Weapons Resistance Factions Reapers Skirmishers Templars ADVENT Coalition Alien & ADVENT Life Forms The Chosen Avatar Project Strategy & Tactics Mission Types Continent Bonus Gameplay Mechanics Concealment Dodge Overwatch Suppression Guides & Tips Finances / Resistance Contacts Avenger Optimization Story Walkthrough Combat Tactics XCOM Substack Posts Multiplayer Multiplayer DLC Reinforcement Pack Anarchy's Children Alien Hunters Shen's Last Gift Resistance Warrior Pack War of the Chosen WotC - Tactical Legacy Pack Miscellaneous Game Manual Game Credits Glossary of Terms Murphy's Laws (XCOM2) Technical Information Patches Bugs Mods Long War of the Chosen Long War 2 Wiki Tips

Chimera Squad Overview Game Information Difficulty Strategy Screen Facilities City Map Assembly Spec Ops Training Armory Supply Investigation Scavenger Market Arsenal Weapons Epic Weapons Armor Additional Items Enemies Factions Agents Godmother Cherub Terminal Verge Torque Shelter Blueblood Zephyr Axiom Claymore Patchwork Game Mechanics Strategic Layer Resources Unrest & Anarchy Field Teams Androids Tactical Combat Breaching General Abilities Status Effects

Enemy Unknown (1994)

UFO: Enemy Unknown (aka X-COM: UFO Defense) Overview General Information Background The Geoscape Geoscape UFO Detection UFO Interception X-COM X-COM Bases Base Facilities Manufacturing Research Country Funding X-COM Craft Craft Armaments Soldiers Equipment Weapons Armour Heavy Weapons Platforms Miscellaneous Equipment Aliens Alien Life Forms Overview of Aliens Alien Missions Alien Ranks UFOs UFO Components Alien Artefacts The Battlescape (Tactical Combat) Battlescape Mission Types UFO Crash Recovery UFO Ground Assault Alien Base Assault Terror Missions Base Defence Tactics Field Manual Night Missions Squad Composition Rear Commanders Initial Deployment Scouting Sweeping the Battlescape Time Management Reaction Training Reaction Fire Triggers Alien Movement Patterns Grenades Proximity Grenade Smoke Grenade Grenade Relay Stun Rod Game Strategies A Beginner's Guide Base Management Base Layout Strategy Experience Training Economics Buying/Selling/Transferring Hiring/Firing UFO Recovery Values Manufacturing Profitability Tricks, Tips and Hints Common Mistakes Managing the Item Limit Making the Game Harder Murphy's Laws of X-COM Miscellaneous Information X-COM Timeline Weapon Analysis Sightings in other fandoms Glossary of Terms Data Canisters Realistic Equivalents Cultural Influences on X-COM Mars Game Editors & Mods Council of Funding Nations The Mysteries of X-COM Wish_List_(EU) GUS Music in Dosbox Ideal DOSBox Settings (UFO/TFTD) Technical Information Game Mechanics Damage Explosions Destroying Terrain Damage Modifiers Fatal Wounds Stun Accuracy Formula Reaction Fire Experience Psionics Unconsciousness Recovery Time Equipment Recovery Line of Sight Difficulty Levels Research Technical Details Data Tables Alien Appearance Ratios Inventory TU Table Movement TU Tables Item Weight Unit Height Scoring Kill Modelling Starting Stats Alien Stats Research Times Terrain Exploits Game Files Known Bugs Game Versions Open Questions

Sequels to Enemy Unknown (1994)

X-COM: Terror From the Deep General General Information Background The Geoscape Geoscape X-COM Subs Sub Armaments Aquanauts Equipment Weapons Submersible Weapons Systems Base Facilities Research Alien Research Alien Artefacts Economics Funding Aliens Alien Life Forms Overviews of Aliens Alien Missions Alien Ranks Terror Units Alien Weapon Loadouts Alien Subs Alien Sub Components The Battlescape (Tactical Combat) Battlescape Overview Mission Types Alien Sub Crash Recovery Alien Submarine Assault Terror Mission Port Attack Island Attack Shipping Lane Mission Artefact Site Colony Assault Base Defense T'leth Terrain Game Strategies TFTD Strategy Guide Miscellaneous Weapon Effectiveness tables Weapon Analysis Realistic Equivalents Sightings in other fandoms Enabling the cinematic intro/outro Wish List GUS Music in Dosbox Ideal DOSBox Settings (UFO/TFTD) Technical Information Scoring Data Tables Alien Appearance Ratios Game Files Known Bugs Research Tree Bug Avoidance Guide

X-COM: Apocalypse best viewed in 1280x1024. General Information & Credits History & Background Keyboard Commands Known Bugs Mega-Primus Cityscape Cityscape Overview Cityscape Maps Game Difficulty Organizations Buildings & Areas Population Unit Attributes Damage & Modifiers Relations Trade Score & Technology Progress Cityscape Mission Styles Battlescape Battlescape Overview Battlescape Mission Styles Battlescape Tactics & Gameplay Start A Mission Equipping Agents Agent Controls Using Cover Engaging Hostiles Anti-Alien Strategy Capture Live Aliens Psionic Agents Defend Your Base Combat Format Combat: Real-Time (RT) Combat: Turn-Based (TB) Comparison: RT vs TB X-COM Bases Overview Locations Layouts Facilities Science & Manufacturing Overview Science: Biochemistry Science: Quantum Physics Manufacture: Engineering Agents Overview Attributes Promotions Equipment Armor Vehicles Overview Armaments Engines Equipment & Devices Aliens Aliens Overview Life Forms Exotic Artifacts Alien Infiltration UFO Overview UFO Appearance Cityscape UFO Combat Alien Dimension Overview Dimension UFO Combat Alien Buildings Miscellaneous Information Historical X-COM Timeline Cut Content Cheat Codes Weapon & Equipment Analysis X-COM In Other Works Technical Information Image Properties Audio Properties Music Files Cityscape Files Learning AI Apocalypse Editing Useful Utilities Apocalypse Guides & Modifications User Guides OpenApoc OpenApoc: The Open Source Remake OpenApoc: Suggestions, Ideas, & Concepts

Prequels to Enemy Unknown (2012)

The Bureau: XCOM Declassified
XCOM Game Information From the desk of Myron Faulke Difficulty Levels Achievements The Bureau The Base Investigations Equipment Weapons Personnel Classes Agent William Carter Director Myron Faulke Agent Angela Weaver Lieutenant Leon Barnes Doctor Alan Weir Agent Nico DaSilva Supporting Staff	Aliens Alien Life Forms Infiltrator Axis Origin Missions Gameplay Mechanics Combat Tactics Battle Focus Squads Mission Types Major Operations (Spoliers) Base Investigations Minor Operations Dispatch Missions	Game Strategies Guides & Tips Story Walkthrough Class Builds Miscellaneous News From the Front In-Game Notes In-Game Photos Glossary of Terms Patches Bugs Mods & Suggestions DLC Codebreaker Hangar 6: R&D Agent Donovan Light Plasma Pistol

Spin-Offs

X-COM: Interceptor General Information Background The Frontier Hypernews Network Research Cheats/Exploits

E-Mail X-Com General Information

X-COM: Enforcer General Information The Enforcer, Dr. Standard and the Enemy Weapons and Power Ups The Missions Tips and Tricks

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