Single-player games like Guinea Pig Gunner
Below are 8 single-player Steam games similar to Guinea Pig Gunner, 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 Guinea Pig Gunner page.
Ranked picks
- 1
System Overload
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
System Overload is a hand-drawn acrobatic shooter about parrying enemy bullets and turning them into your own. Destroy an evil robot megacorp by vandalizing the streets with their blood, performing stylish parkour, and dancing through a bullet ballet - all fueled by your hatred for the system.
- 2
Voivod: The Nuclear Warrior
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
A brutal action game set in a collapsing sci-fi nightmare. Battle biomechanical mutants, traverse shifting landscapes, and uncover fragments of your lost mind as you descend into a twisted post-apocalyptic world.
- 3
John's Quest
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
You are John Appleby, game historian. Your shadow twin "Evil John" has been doing some evil business and is causing genres to collide! Only you have the power to restore peace and save gaming...
- 4
Bad Dead Shift
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
When a zombie virus overruns the city, an ordinary security guard becomes the last hope in a fast-paced side-scrolling pixel action game - fighting through dangerous buildings, saving survivors, and staying alive amidst the chaos of an infected city.
- 5
Phantom Beasts - Redemption
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
St. Petersburg, Florida. 2059. The city is a quarantine zone and mysterious creatures make the difference in every battle. Phantom Beasts - Redemption is a free to play cyberpunk 2.5D shooter that blends creature training with explosive, gore-filled combat that makes every second a spectacle.
- 6
Gun Devil
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
GUN DEVIL is an explosive platformer about rescuing your kidnapped hell wife from Satan's child, the Caramelized Dumbass and his Pimp Legion.
- 7
Pengame
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
Play as the stickman you drew in your school notebook to defeat the ultimate evil: the TEACHER!
- 8
GOBBLE
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action with Guinea Pig Gunner.
GOBBLE is a 2D action platformer with eating as its central theme. Venture out into the world searching for your missing family, armed with a “sickle” that devours monsters to get stronger.