Single-player games like Spaceman Defender
Below are 14 single-player Steam games similar to Spaceman 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 Spaceman Defender page.
Ranked picks
- 1
Super Arcade Boy in Defender of Planet Earth
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman 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.
- 2
Insectipede
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
Time to bug out and blast back in this arcade shooter packed with waves of insects and UFOs. Fight through 50 challenging stages, grab power-ups, and chase the high score.
- 3
Martian Invaders
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
WE HAVE ALIENS, YOU DON'T—Blast Martian invaders and flying saucers across 30 stages with robotic voice effects. Use your destructible shield, rescue army men for bonus points, and chase the high score.
- 4
GANA FORCE
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action with Spaceman Defender.
Gana Force is a Horizontal shooter where you'll unleash powerful firepower, skillfully dodge bullets, and utilize the terrain to maneuver and defeat enemies. Game environments include alien cell levels, scorching sun, space battleships, and more. Powerful bosses and bullet hell challenges await you!
- 5
VERZEUS
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action with Spaceman Defender.
Blast and weave your way through enemy fire while managing a wide variety of ship power-ups in this retro style horizontal shoot-'em-up!
- 6
REMOTE LIFE
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
Remote Life is a 2D Side scrolling space shooter (shmup) for PC. Experience a fast paced action game with insane scary graphics, and hyper jump into a brutal-frenetic-techno-alien world. Free the world from this dreadful nightmare before its nauseating breath of horror destroys mankind.
- 7
SATAZIUS
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
The year is 2051. Location: SATAZIUS, a long-abandoned planet. The cruiser Agano was on patrol when it was attacked and stricken by a confederacy of space pirates that had established a base on SATAZIUS. The pirates attacked the Agano intending to steal the assault ship ‘Trafalgar’ that was stowed aboard the Agano, but the Trafalgar made...
- 8
Syder Arcade
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
Killing zombies never gets old, but sometimes you just need a break. Get back to some serious old-school gaming with Syder Arcade! Syder Arcade is a love letter to Amiga games of the ‘90s, no coins, no upgrade grinding, just your tenacity and a motherload of alien invaders.
- 9
The Ultimate Trivia Challenge
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Indie with Spaceman Defender.
How well do you know your trivia? Choose from 9 popular categories and challenge friends and family in Party Mode (up to 4 players).
- 10
Brick Breaker Premium
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
The classic brick-breaker game is back! 35 challenging levels to complete with that classic brick breaker feel, heroic storyline, and classic power-ups. Unlock the ending cutscenes—if you’ve got the skill to make it that far.
- 11
Brick Breaker Premium 3
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Action and Indie with Spaceman Defender.
The arcade classic returns with the trilogy finale. Blast through 50 new levels to wipe out The Evil Snarfers for good. Use classic power-ups and the new Multi-Shot Laser Paddle to save Earth—and unlock the final ending cutscenes.
- 12
Trivia King
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Indie with Spaceman Defender.
Challenge yourself in Trivia King or play Party Mode (up to 4 players). Includes 8 popular categories and thousands of multiple-choice questions.
- 13
The Movie Trivia Challenge
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Indie with Spaceman Defender.
How well do you know your movies? Choose from 9 fan-favorite categories and challenge friends and family in Party Mode (up to 4 players).
- 14
Retro Racers 2
Single-player alternative to Spaceman Defender — playable solo, no multiplayer required. Shares Indie with Spaceman Defender.
Retro Racers 2 delivers top-down arcade racing with 12 tracks to unlock, four classic power-ups, and hazards that punish mistakes. Time gate openings for an edge, dodge sudden oil slicks, and race in smooth 60FPS HD.