Single-player games like Galactagon
Below are 8 single-player Steam games similar to Galactagon, 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 Galactagon page.
Ranked picks
- 1
Micron Survivor
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Micron Survivor is a survival game with rogue-lite elements where you play as alien microorganisms under the microscope. Evolve, unlock research objectives, find symbiotic weapons, upgrade your builds, and fight hordes of terrestrial organisms to rule the microcosm.
- 2
Starwhisker
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Magic cats in space fighting aliens. Light is your weapon, and the Void is hungry. Shift between wavelengths of light, discover powerful upgrades. Help Luma, the last Starwhisker restore hope to a universe being consumed by darkness.
- 3
Fading Reel
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
A sepia Roguelike — lead a chained squad through 22 waves. Map events split your line, milestone recruits add firepower. Linked Blink, run upgrades, 19 Evolutions, and a permanent meta tree carry you to the final Boss Hydra.
- 4
Wanderburg
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Drive your Castle on Wheels into battle in this minimalist medieval roguelike of roaming fortresses! Devour entire villages, build your modular arsenal of siege machinery and break the game as you grow with every stronghold you crush.
- 5
CyberSprawl: Survivors
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Outbuild the horde in a cyberpunk bullet heaven with loot worth discovering. Evolve your weapons, explore dangerous districts, and find gear that opens new build choices. Get your haul home, gear up, and go back for more.
- 6
I'm No Demonlord
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
"I'm No Demonlord" is a Roguelike shooter bullet hell game. High freedom in mechanics leads to unique playthroughs. As a demon-possessed hero, battle enemies, grow, and unveil dark schemes. Can he accept his new role? Save "kinds" or destroy "outsiders"? Good or evil? The choice is yours.
- 7
Deckzin
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Deckzin is a dungeon crawler deckbuilder with roguelike and RPG elements. Play as fantastic heroes in this action autobattler, build and refine legendary decks, adapt to encounters and events in fast-paced runs, defeat powerful bosses, and keep the world’s last light alive.
- 8
Mighty Loot
Single-player alternative to Galactagon — playable solo, no multiplayer required. Shares Action with Galactagon.
Mighty Loot is an Online Co-op Action Roguelike where you aim to reach the top of the Hero Leaderboard. Overcome relentless hordes and shifting challenges by crafting and reshaping exclusive skills on the fly, instantly adapting to any situation or weather condition standing between you and victory.