Single-player games like AGE OF ALIENS
Below are 8 single-player Steam games similar to AGE OF ALIENS, 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 AGE OF ALIENS page.
Ranked picks
- 1
Millennium Conflict
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Action and Strategy with AGE OF ALIENS.
You are the last survivor. Capture towers, command a squad of unique generals, and battle through 40 missions across 10 distinct worlds as you fight to reclaim a universe that has fallen to the enemy.
- 2
Von Neumann Project
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required.
Von Neumann Project is about a self replicating probe as it charts the galaxies, peacefully of course. Mine, build, expand, and explore in this sci-fi RTS. Remember to have as little impact on your surroundings as possible and protect yourself at all costs.
- 3
Little Kingdom RTS
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Action and Strategy with AGE OF ALIENS.
Little Kingdom RTS is an indie real-time strategy game set in a medieval fantasy world. Gather resources, build settlements, raise walls, and grow your small kingdom. Command an army of knights, archers, and mages to fight off rival kingdoms, orcs, and undead.
- 4
Rescue Dogs vs Aliens Tower Defense
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Strategy and Casual with AGE OF ALIENS.
Command heroic rescue dogs in a colorful tower defense battle against alien invaders. Build, upgrade, unlock heroes, defend strange battlefields, and survive wave after wave in RDVA-TD: Rescue Dogs vs Aliens.
- 5
Swarming Planet
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Strategy with AGE OF ALIENS.
Build towers and learn abilities to defend against swarms of hundreds of on-screen hostile alien creatures. Choose between sets of randomized upgrades that both upgrade you and the alien swarm. From enormous explosions to far-reaching flamethrowers, no two games are the same.
- 6
Micron Defense Force
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Strategy with AGE OF ALIENS.
A Roguelike Tower Defense in space with missions to conquer. Can you hold against the spreading alien bosses? Build and upgrade towers against the corruption. Choose your technologies and warpspeed your way to victory.
- 7
Poker Defense
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Strategy and Casual with AGE OF ALIENS.
Build your defenses with the towers you earn from playing cards and use your power ups to stop your enemies in this strategic card game tower defense!
- 8
TechGuardian: Territory Defense
Single-player alternative to AGE OF ALIENS — playable solo, no multiplayer required. Shares Strategy with AGE OF ALIENS.
This is a sci-fi strategy game featuring a Defense Mode focused on tower defense and an Attack Mode focused on combat. The game includes over 30 different buildings and units, all of which can be upgraded through entry editing to enhance their performance and firepower.