Single-player games like Nullbreak Protocol
Below are 8 single-player Steam games similar to Nullbreak Protocol, 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 Nullbreak Protocol page.
Ranked picks
- 1
A.K.O - Arrow Keys Only
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action with Nullbreak Protocol.
One hand. Four arrow keys. Your weapon auto-fires while you dodge, climb, and swap elements to survive. 5 pilots, 75 skins, 35+ relics, 10 trials. A tiny roguelike shooter built around a beautiful bad idea.
- 2
Paddle Legends
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
Paddle Legends is a challenging, arcade-inspired roguelite with RPG elements. Use your paddle to block projectiles and send them back at your enemy to score and deal damage. Grab upgrades, unlock new paddles, and acquire permanent boosts to create fun new builds as you fight tougher enemies!
- 3
Full Metal Hell
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
Full Metal Hell is a light roguelike shooter that combines fast-paced combat with physics-based collisions. Drive a variety of vehicles, equip different weapons and items, and build your own unique playstyle as you crush your way through a mechanical horde!
- 4
The Punchbag Machine
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
A fast-paced pixel-neon rhythm roguelite where every missed punch can end your run. Hit falling notes, chain combos, upgrade your boxer, defeat 9 bosses, and climb the leaderboard.
- 5
MASSFALL
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
Weld physical parts onto the ball to change its shape, weight and bounce—even as pieces break off mid-run. Descend through 99 pinball stages, build your own stages and courses, or bend the rules in MOD MODE. A physics-driven pinball roguelite where the ball is the build.
- 6
Micron Survivor
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Casual with Nullbreak Protocol.
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.
- 7
Let Them Come: Onslaught
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action with Nullbreak Protocol.
Survive the relentless offensive of the alien horde in Let Them Come: Onslaught, a sci-fi survival roguelite. The pursuit of the perfect build and an ever-expanding arsenal of abilities are the keys to your success.
- 8
Hyper Sphere
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action with Nullbreak Protocol.
Hyper Sphere is a high-octane roguelite bullet hell where you shoot, parry and dodge through waves of evil cubes. Combine a wide variety of wacky items to create broken builds, parry projectiles back at your enemies, and defeat the final boss.