Single-player games like U.F.O. K.O. Tower Defense
Below are 8 single-player Steam games similar to U.F.O. K.O. Tower Defense, 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 U.F.O. K.O. Tower Defense page.
Ranked picks
- 1
Get Off My Space!
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
Get Off My Space! is a tower defense game where you rely on skillful tower placement and resource management to beat upcoming dangers of the galaxy. Combining strategy and micro-managing fire groups, you will overcome the hardest level objectives.
- 2
Paper Protocol
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with U.F.O. K.O. Tower Defense.
Paper Protocol is a Tower Defense game with elements of Real Time Strategy. Command a versatile mech and a squad of high tech turrets to defend the Paper Co. building from angry trees! Upgrade both yourself and your turrets to defend against the trees and their unique abilities.
- 3
Endless Escalation
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
A strategy-driven incremental where choices actually matter. Upgrade costs scale together, forcing meaningful trade-offs instead of blindly upgrading everything. Build defenses, specialize your army, and adapt to overcome ever-evolving enemy forces.
- 4
Cosmic Robots
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
Defend your planet from waves of robot invaders! Build powerful turrets, upgrade your defenses, and command robot units to fight drones, tanks, and massive bosses. Then send your own forces to attack the enemy planet in this action-packed sci-fi tower defense game.
- 5
CARNAGE OFFERING Tower Defense
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
The replicator robots are back! It's 2528. The machines are increasingly infecting the planets with genetically modified monsters. Challenge them and try to stop the onslaught. Upgrade buildings and heroes, mine resources, discover technology and fight to save humanity!
- 6
Creeper World 4
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.
- 7
Infested Planet
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
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.
- 8
Anomaly: Warzone Earth
Single-player alternative to U.F.O. K.O. Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with U.F.O. K.O. Tower Defense.
Lead an armored squad through the perils of this reversed tower defense action-strategy game!