Single-player games like Gamma Bros
Below are 16 single-player Steam games similar to Gamma Bros, 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 Gamma Bros page.
Ranked picks
- 1
Earthion
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action with Gamma Bros.
Earthion is a side-scrolling space shooter developed natively for 16-bit systems. Guide space fighter pilot Azusa Takanashi in her fight to repel the alien invaders and save planet Earth.
- 2
Geometry Wars: Retro Evolved
Single-player alternative to Gamma Bros — playable solo, no multiplayer required.
Geometry Wars: Retro Evolved is a old school style shooter, but remixed for the 21st century with next generation graphics and deep, modern gameplay. Playing is simple: you are a geometric "ship" trapped in a grid world, facing off against waves of deadly wanderers, snakes, and repulsars.
- 3
Mega City Force
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
Retrowave Action Roguelike featuring tough agents battling crime to the electrifying music of artists like Droid Bishop, Timecop1983, and more! Choose your agent and dive into hardcore action against enemies and bosses, utilizing a vast arsenal and special abilities that will define your playstyle
- 4
CPU Invaders
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Indie with Gamma Bros.
Invaders are living inside your computer. You shouldn't let that happen! Interact with your desktop while playing, watch Youtube videos, chat with your friends and more! CPU Invaders overlaps the game itself with your computer screen.
- 5
PixelJunk™ Shooter
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action with Gamma Bros.
In PixelJunk™ Shooter, you must pilot your spacecraft through a range of cavernous environments in a bid to save the scientists trapped underground. Making your way through the game will rely on your keen sense of observation and the ability to manipulate your surroundings.
- 6
Space Invaders Extreme
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action with Gamma Bros.
The critically acclaimed update to the Space Invaders franchise has arrived to invade Steam with greatly improved graphics and audio! Packed with pulsing, vibrant visuals enhanced further by interactive sound. The invaders have evolved, the question is: can you keep up?
- 7
Renegade Ops
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action with Gamma Bros.
Blast your way through enemy lines to defeat Inferno, a madman intent on global domination. Destruction just got awesome.
- 8
GUNFIELD
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
GUNFIELD – A game that combines the genres: shoot 'em up, roguelite. Choose the perfect weapon combinations and upgrade your ship to destroy hordes of enemies and giant bosses, using strategy and a powerful arsenal.
- 9
Dino Run DX
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
DINOSAURS. PIXELS. PYROCLASTIC DOOM WALLS. MASSIVE INDIE CROSSOVERS. Dino Run DX has all of that and more. Come rediscover the original runner and escape extinction all over again.
- 10
Utopia Must Fall
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
Defend humanity's last surviving metropolis from mysterious alien machinations in this challenging base-defense arcade shooter. Featuring rapid upgrade progression, procedurally generated attack waves, dark humor and laser-sharp aesthetics.
- 11
Potatoman Seeks the Troof
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Indie with Gamma Bros.
Potatoman will put your reflexes and worldview to the test as you journey through scorching deserts, dark forests, busy cities, the tallest mountains and eventually your own potato-consciousness in search of the ultimate answer. Are you prepared to face the TROOF?
- 12
Last Horizon
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
A minimal space exploration and survival game. Pilot the last vessel of a fallen civilization into the vast unknown, in search of a new world to call home.
- 13
Glorkian Warrior: The Trials Of Glork
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Indie with Gamma Bros.
A comic-styled mashup of Galaga-style shoot-em-up, simple platforming action, and Saturday morning cartoon. In collaboration with Eisner-award-winning cartoonist James Kochalka!
- 14
Snowball!
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
. . .. ... ......A homegrown, hand-cranked winter pinball adventure. Send your behemoth snow spheres through a bobsled maze of snowbanks, homemade wooden paddles, Tesla coils, igloos, railcars and more... ... .. . .
- 15
Bitku
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Indie and Free To Play with Gamma Bros.
A totally free simple storyteller, a comic creator, an art toy, a new way to express yourself in pixels... BITKU is all or none of the above.
- 16
Cheap Golf
Single-player alternative to Gamma Bros — playable solo, no multiplayer required. Shares Action and Indie with Gamma Bros.
A retromodern and surreal minigolf comedy hosted by the infamous AI bot SUSAN. ...//-- Fling up and go FULL BOOP --\\...