Single-player games like FORTRESS DEFENDER
Below are 8 single-player Steam games similar to FORTRESS DEFENDER, 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 FORTRESS DEFENDER page.
Ranked picks
- 1
Gray Goo
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Gray goo is a short retro arcade shooter with lots of upgrades. This game is about destroying goo in space and saving the universe.
- 2
Hot Guns: International Missions
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Your conventional methods of operation are "shoot first then shoot again!"
- 3
Super Arcade Boy in Defender of Planet Earth
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
A retro-style classic side-scrolling shoot ’em up. Fly Super Arcade Boy through 8 levels, blast enemy waves, grab power-ups, and take down bosses.
- 4
Freedom! Do or Die
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
When terrorism threatens the world there is no need to send a bunch of iconic movie heroes back from the '80s. One under-funded over-powered mercenary is all that's needed to save the world in this epic run 'n' gun destruction-fest of a homage to Broforce!
- 5
Gundroid
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Protect the Earth from an alien invasion in this Run N’ Gun action spectacle. Take control of G.U.N.N.R. and battle your way through a blast from the pixelated past.
- 6
UKI-UKI-TENGOKU2
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Retro 2D side-scrolling shooter with pixel art. Control a penguin (Laser), a fish (Firebreath), and a human (Railgun) to achieve a high score!
- 7
PigShip and the Giant Wolf
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Pig Ship and the Giant Wolf is a classic Shoot'em Up with a 8btis monochrome aesthetic. Cross the 6 worlds full of enemies and defeat the Giant Wolf to save your brothers.
- 8
Absolute Blue
Single-player alternative to FORTRESS DEFENDER — playable solo, no multiplayer required. Shares Action and Indie with FORTRESS DEFENDER.
Sidescrolling Shoot’em’up that will transport you back into the 90s (and space).