Single-player games like X-COM: Terror From the Deep
Below are 15 single-player Steam games similar to X-COM: Terror From the Deep, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like X-COM: Terror From the Deep page.
Ranked picks
- 1
X-COM: UFO Defense
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.
- 2
X-COM: Apocalypse
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
There's something evil in the city tonight... Earth has been ravaged by human excess, petty conflict and alien invasion. The world's population has been herded into huge cities, the first of which was Mega Primus. 2084: A Utopia shattered, social collapse and civil unrest reigns in Mega Primus. Fiendish aliens terrorize the city.
- 3
Underwater Wars
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
Underwater Wars is a tactical turn-based strategy game that takes place in the depths of the ocean. Two powerful factions of people are fighting a war for territory and resources, but everything changes when mysterious "Aliens" enter the conflict.
- 4
Xenonauts
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.
- 5
Stirring Abyss
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
Stirring Abyss is an indie tactical squad-based game with strong RPG elements in which you uncover the ancient mysteries of the depths depicted in the classic vein of Lovecraftian horror.
- 6
XCOM: Enemy Unknown
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
- 7
Into the Breach
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
Control powerful mechs from the future to defeat an alien threat. Each attempt to save the world presents a new randomly generated challenge in this turn-based strategy game.
- 8
Gears Tactics
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
Gears Tactics is the fast-paced, turn-based strategy game from one of the most-acclaimed video game franchises – Gears of War. Outnumbered and fighting for survival, recruit and command your squad to hunt down an evil mastermind who makes monsters.
- 9
RimWorld
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
- 10
Sid Meier's Colonization (Classic)
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required.
The New World lies before you with all its peril, promise and infinite possibility. Your colonists anxiously follow you to shore. The treasures of an entire continent await you.
- 11
X-COM: Enforcer
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
X-COM: Earth's top-secret eXtraterrestrial COMbat unit The Place: America - early 21st century The Mission: Eradicate the extraterrestrials Alien forces have invaded Earth and are terrorizing the population.
- 12
X-COM: Interceptor
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required. Shares Strategy with X-COM: Terror From the Deep.
They're back...only this time the heinous aliens are out to destroy Earth and rule the new frontier. As X-COM commander, it's your sole duty to protect humanity and the prized mining operations in outer space.
- 13
Sid Meier's Covert Action (Classic)
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required.
Sid Meier's Covert Action - A Techno-Thriller From the Case Files of Max Remington.
- 14
Sid Meier's Pirates! Gold Plus (Classic)
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required.
Ahoy mateys! From the Mind of Sid Meier, The Golden Age of Buccaneering has returned with Pirates! Gold!
- 15
BloodNet
Single-player alternative to X-COM: Terror From the Deep — playable solo, no multiplayer required.
I met her in her penthouse, expecting payment for the freelance job-and perhaps a little more. But I got more than I bargained for. I'm now part of an exclusive fraternity that moves catlike in the night through a world of high technology and senseless violence.