Single-player games like Star Defence
Below are 8 single-player Steam games similar to Star Defence, 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 Star Defence page.
Ranked picks
- 1
Galactic Defense: Automation
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Simulation with Star Defence.
"Galactic Defense: Automation" is a Placement, Automated Battle, Real-Time Strategy game. Players can place construction plans, observe automated construction, automated battles, and unlock new technologies. Players pass the level after collecting tech points through activities.
- 2
AsteroidTD
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
Try to survive in infinite asteroid cloud as long as possible in reworked tower defence style. FInd your own playstyle and beat your own records or chillout with original ambient soundtracks. Build, explore, think - everything to create your own colony in this cold space.
- 3
Epic Space Battles
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
Shape massive fleet battles above Earth in this sci-fi strategy auto-battler. Build fighters, bombers and capital ships, expand production, choose upgrades and unleash commander abilities. Your fleet fights automatically. Keep the war going in Infinite Mode.
- 4
Galactic Conflict
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Simulation with Star Defence.
A real-time sci-fi 4X strategy game where you explore procedurally generated star systems, expand your empire, manage resources, build fleets, and wage war against multiple AI factions in a dynamic and evolving galaxy.
- 5
The Last Mission
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
The Last Mission is an auto-battler and space battle simulation game where you command a fleet of spacecraft in vast, strategic battles. Equip, configure and upgrade your ships to be ready to battle the enemy.
- 6
Ship Regulus
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
In the first year of the ephemeris, the warp engine was invented. Due to the initial engine being too large, it was installed on the space city Regulus. During engine testing, the jump signal attracted an alien fleet, and the Ship Regulus embarked on a flight path.
- 7
Space Team
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
‘Space Squad’ is a top-down space shooting survival game. Protect your central circular base and aim at enemies with your mouse. Earn skill points by defeating enemies to unlock various abilities. Face waves of incoming enemies and do your best to survive.
- 8
Earth’s Last Defense Idle Fleet
Single-player alternative to Star Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Star Defence.
Command Earth’s last fleet in an idle space-defense game where every wave, kill, upgrade, ship, and module pushes your defense further. Build fighters, drones, corvettes, heroes, turrets, and permanent upgrades as the alien hive grows stronger.