Single-player games like One Tower Defense
Below are 8 single-player Steam games similar to One 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 One Tower Defense page.
Ranked picks
- 1

Slorbis: Tower Defense
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Immerse yourself in the cozy, minimalist world of Slorbis: Tower Defense. Build towers with unique roles, buy modifiers of varying rarities, collect money, and face the unpredictability of procedurally generated maps as you defend the king from dark spirits.
- 2

Lines of Battle
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Command armies in tactical battles with simultaneous turns during the Napoleonic Wars. Lead forces through single-player strategy campaigns, master formations and flanking tactics, then test your skills in competitive 1v1 and 4v4 battles.
- 3

Dimension Defenders
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with One Tower Defense.
Tower Defense Redefined. Race friends in ranked 1v1, defend together in 2-player co-op, or solo your way through dimensions of escalating chaos.
- 4

Seed World
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Seed World is a game that aims to combine automation, conveyor belts, and level progression. The game simplifies automation 'construction' into a series of progress bars, with each progress producing or consuming resources, and players need to manage resources.
- 5

Tower Survivors
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with One Tower Defense.
'Tower Survivors' is a dark fantasy survival RTS where you must survive, upgrade and defend humanity against massive unending armies from Anubis Tomb, Jurassic Valley and Vampire Monastery. Set in three different empires hell-bent on your destruction, it’s not if you can survive, but how long.
- 6

rymdkapsel
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Build a space station. Command the tiny crew. Explore the galaxy. A meditative space strategy game.
- 7

Clutchtime™: Basketball Deckbuilder
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Build your perfect deck and become a Champion.
- 8

Element TD 2 - Tower Defense
Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.
Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.