Single-player games like UFO: Aftershock
Below are 11 single-player Steam games similar to UFO: Aftershock, 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 UFO: Aftershock page.
Ranked picks
- 1

UFO: Aftermath
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
UFO: Aftermath is a 3D isometric, tactical strategy game with a rich and compelling sci fi story.
- 2

UFO: Afterlight
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
The story is situated on Mars. It starts where UFO: Aftermath left off and runs simultaneously with UFO: Aftershock. While the Laputans on Earth are fighting Wargots and Starghosts and finding out what caused the destruction of their home planet, a small colony on Mars is trying to survive and flourish.
- 3

Polaris Sector
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
Can anyone build an empire in a place like this? Other factions are naturally suspicious of newcomers and may wage war at the first sign of unidentified craft. Here, a natural death is an uncommon luxury.
- 4

X-COM: Apocalypse
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
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.
- 5

Galactic Civilizations III
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
- 6

Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.
- 7

UFO: Extraterrestrials Gold
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
UFO: Extraterrestrials GOLD is a new GOLD edition which includes a number of changes and improvements giving a player a new look on the classic game: new maps, possibility to hire soldiers, globe UFO swarms and configurability.
- 8

Infested Planet
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
- 9

XCOM: Enemy Unknown
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
- 10

X-COM: UFO Defense
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required. Shares Strategy with UFO: Aftershock.
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.
- 11

The Bureau: XCOM Declassified
Single-player alternative to UFO: Aftershock — playable solo, no multiplayer required.
The year is 1962 and the Cold War has the nation gripped by fear. A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.