Single-player games like Attack of the Earthlings
Below are 15 single-player Steam games similar to Attack of the Earthlings, 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 Attack of the Earthlings page.
Ranked picks
- 1
XCOM: Enemy Unknown
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
- 2
XCOM®: Chimera Squad
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
XCOM: Chimera Squad delivers an all-new story and turn-based tactical combat experience in the XCOM universe.
- 3
Space Tyrant
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy and Indie with Attack of the Earthlings.
Terrorize the galaxy for fun and profit! Space Tyrant is a surprisingly deep beer & pretzels strategy game set in a darkly humorous future. Build a mighty space force, disintegrate peaceful aliens, and rule irresponsibly on your relentless march to total domination.
- 4
Xenonauts
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy and Indie with Attack of the Earthlings.
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
Destroy All Humans!
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required.
The cult-classic returns! Terrorize the people of 1950's Earth in the role of the evil alien Crypto-137. Harvest their DNA and bring down the US government in the faithful remake of the legendary alien invasion action adventure. Annihilate puny humans using an assortment of alien weaponry and psychic abilities.
- 6
Iratus: Lord of the Dead
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Indie and Strategy with Attack of the Earthlings.
Iratus: Lord of the Dead is a turn-based tactical roguelike RPG set in a dark fantasy universe. Lead an army of undead to help an angry necromancer in his quest to reach the surface world and bring death to the mortal realms!
- 7
Slayaway Camp
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy and Indie with Attack of the Earthlings.
A killer puzzle game where you control Skullface, a psycho slasher bent on slaughtering camp counselors at the title campground. Slide an adorable voxel murderer around hundreds of isometric puzzle levels to squash, flay, and decapitate hapless victims in this darkly comic homage to 80s horror.
- 8
Reverse Crawl
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
A dungeon crawl where YOU are the dungeon! Lead your minions in tactical turn-based combat against the pesky heroes, and unlock a variety of evil Powers. With a dynamic campaign system and a branching storyline, "Reverse Crawl" lets you experience an RPG from a whole new angle!
- 9
X-COM: UFO Defense
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.
- 10
Evil Genius
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
Everybody wants to rule the world! Achieve global power with EVIL GENIUS, the one and only complete world domination simulator. All the everyday tasks of the deliciously wicked mastermind are available to experience and master from building your ultra-secret base to developing spectacular super-weapons to carry out your nefarious master...
- 11
The Bureau: XCOM Declassified
Single-player alternative to Attack of the Earthlings — 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.
- 12
XCOM® 2
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy with Attack of the Earthlings.
XCOM 2 is the sequel to XCOM: Enemy Unknown, the 2012 award-winning strategy game of the year. Earth has changed and is now under alien rule. Facing impossible odds you must rebuild XCOM, and ignite a global resistance to reclaim our world and save humanity.
- 13
Monstrum
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Indie with Attack of the Earthlings.
Monstrum takes the traditional survival horror formula and remixes it completely with procedurally generated levels, permadeath, and AI driven predators, ensuring that nowhere on its derelict cargo ship is ever truly safe.
- 14
Bootleg Steamer
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Strategy and Indie with Attack of the Earthlings.
In this rogue-like game, you embark on your journey as a captain during the tumultuous American Prohibition. Overcome challenges like inclement weather, relentless Coast Guard pursuit, shrewd Mafia dealings, and your own financial pitfalls, all while ensuring your path to wealth remains unhindered.
- 15
Wilderdark
Single-player alternative to Attack of the Earthlings — playable solo, no multiplayer required. Shares Indie with Attack of the Earthlings.
Something dangerous is lurking in the wilderness. Wilderdark is a first-person survival horror game where you must navigate a strange island inhabited by ectoparasitic dinosaurs and organisms. You must remain vigilant to stealthily obtain evidence, samples, and craft items to survive.