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
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!
- 3
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.
- 4
Warhammer 40,000: Shootas, Blood & Teef
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
From the developers of the Guns, Gore and Cannoli franchise comes a new 2D run & gun platformer: Warhammer 40,000: Shootas, Blood & TEEF! Spearhead an Ork invasion, destroy the hive city and kill your warboss! ‘Ere we go!
- 5
Operation Hardcore
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
Operation Hardcore is an action-packed 2D side-scrolling shooter inspired by classic twitchy action games of yesteryear, but with modern touches and conveniences.
- 6
Rise & Shine
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action with Guinea Pig Gunner.
Welcome to Gamearth, a once peaceful planet now threatened by the warmongering Space grunts of Nexgen. In the aftermath of their devastating first strike a child named Rise is forced to take on the sacred gun Shine - and with it the fate of his world.
- 7
Missing Banban
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action and Adventure with Guinea Pig Gunner.
Grab your weapons and delve into this action side-scroller intense adventure. Jump around and explore the insane levels. Shoot and dodge your way through enemies. Fight to find your friend and solve the disappearance!
- 8
Rogue Stormers
Single-player alternative to Guinea Pig Gunner — playable solo, no multiplayer required. Shares Action with Guinea Pig Gunner.
An action packed platform shooter mashed-up with roguelike and RPG elements, crazy 3D graphics and co-op multiplayer for one to 4 players.