Single-player games like Stop the Saturnians!
Below are 8 single-player Steam games similar to Stop the Saturnians!, 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 Stop the Saturnians! page.
Ranked picks
- 1
Martian Invaders
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
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.
- 2
Netherspace
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
A sci-fi shoot'em'up game with heavy focus on upgrades experimentation, featuring two unlikely heroes that must work perfectly together, despite their share of secrets, to surpass their limits and succeed in eliminating a threat that might destroy both Earth and Andraxia if left unchecked.
- 3
Cosmic Cruiser
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
In this unique shooter from 1984. take on the role of a pilot of an out-dated Cosmic Cruiser, fighting to rescue the crew of a distant space station that had been captured by a raiding party from the sinister Rallom Empire.
- 4
Gates of Zendocon
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
In this classic side-scrolling shoot-em-up, originally published in 1989 for the Atari Lynx handheld console, take on the role of a starship pilot trapped in a web of 51 interconnected hostile universes by the evil spider Zendocon.
- 5
Astro Fighters
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
Astro Fighters is a tough old school vertical scrolling bullet hell shooter designed to test your skills with non-stop arcade style action. Fight against large bosses at the end of every level and compete for the high score across 4 difficulty modes to be the best fighter pilot in the game.
- 6
Arcadia
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
In this highly addictive top-down arcade shoot-em-up from 1982, originally for the ZX Spectrum, defend yourself from wave upon wave of deadly alien combatants using your Ion Thrust Drive and dual Plasma Disruptors.
- 7
Space Warpster
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
A fast-paced retro arcade shooter inspired by classic 1980s side-scrolling space combat. Weave through organic obstacles, survive relentless enemy waves, and defeat powerful end-level bosses in a pure, skill-driven singleplayer experience.
- 8
Blue Jay Joyride
Single-player alternative to Stop the Saturnians! — playable solo, no multiplayer required. Shares Action with Stop the Saturnians!.
Blue Jay Joyride is a fast-paced 2D space shooter. Go through waves of enemies and fight progressively harder bosses. Collect one of the many unique powerups to give your ship a fighting chance in this intense game.