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.
A chaotic roguelite twist on classic retro arcade-style gameplay. Unlock paddles, grab upgrades, and new ball powers as you battle through dynamic levels, obstacles, and bosses across three campaigns and an endless mode.
- 3
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.
- 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
Pongo! Paddle Pals!
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Indie and Casual with Nullbreak Protocol.
Pong... But it's a roguelite! Pick a class, pick a ball blessing, then paddle your way through three acts of devious enemy paddles. Stack relics, find synergies, survive floor modifiers warping the ball mid-rally. PONG! IT! UP!
- 6
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.
- 7
Immunity Protocol
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
Pilot an immune-cell sentinel in a neon pixel-art horde-survival auto-shooter. Move manually, auto-fire evolving weapons, draft upgrades, equip symbiotes, and survive escalating pathogen swarms inside a collapsing biotech system.
- 8
Forecast Death
Single-player alternative to Nullbreak Protocol — playable solo, no multiplayer required. Shares Action and Indie with Nullbreak Protocol.
Survive the chaos of a bullet-heaven action game. Tear through enemy hordes, stack wild ability combos, and endure cataclysms that rewrite the rules mid-fight. The pace ramps up every minute - either you grow stronger, or you get wiped out.