Single-player games like Ad Astra: Sci-Fi Tower Defense
Below are 8 single-player Steam games similar to Ad Astra: Sci-Fi 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 Ad Astra: Sci-Fi Tower Defense page.
Ranked picks
- 1
Cyberwinter
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
Cyberwinter is an isometric action strategy game. On a distant planet with a harsh climate, you have to fight legions of dangerous monsters for a new home for humanity. Build bases, develop and defend them.
- 2
Rogue Command
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
True RTS gameplay reinforced with roguelite build crafting. Control units with bullet-time precision. Call down bases and raise armies. Drafted from a different arsenal every run. Weave builds that break the game. Or the game breaks you.
- 3
Towers & Goblins: The Last Stand
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Ad Astra: Sci-Fi Tower Defense.
Build towers, manage resources, and lead units to defend your kingdom against goblins. Every decision you make determines your kingdom's fate.
- 4
Negative Energy
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Strategy with Ad Astra: Sci-Fi Tower Defense.
Negative Energy is a tower defense game with basic RTS mechanics, where your goal is to defend the construction of a Dyson sphere, while fighting against waves of hundreds of enemies ships.
- 5
Tower Factory
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
Tower Factory is a tower defense and automation game with roguelite elements. Optimize resource production using conveyor systems while defending against monster waves. Can you find and destroy the enemy tower before it's too late?
- 6
Taur
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
- 7
IRON GUARD
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
A sci-fi roomscale VR Tower Defense game. Strategize to destroy waves of rogue robots and assist the powerful turrets with a handheld drone. Build and collect resources and help evacuate your crew from the alien planet.
- 8
Crossfire: Legion
Single-player alternative to Ad Astra: Sci-Fi Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with Ad Astra: Sci-Fi Tower Defense.
Crossfire: Legion is a real time strategy game featuring tactical action in furious battles across a shattered version of the near future. Raise and customize your army to engage in intense online combat and carve your own path as you rise through the ranks. It’s a new generation of warfare.