Single-player games like Proto Trigger
Below are 8 single-player Steam games similar to Proto Trigger, 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 Proto Trigger page.
Ranked picks
- 1
Autonomous Anarchy
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
A retro twin-stick bullet-hell where you fight hordes of enemies, collect powerful weapons and upgrades, and go head to head with menacing mechanical bosses. Take on the hordes solo or with a friend in local co-op!
- 2
Crisis Wing
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Crisis Wing is 90's style vertically scrolling arcade shooter. Master 7 intense vertical stages, and take down massive bosses. Play solo or with a friend in local co-op. Get ready for pure, high-octane action.
- 3
Hollow Ground
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Top-down shooter inspired by 90s arcade games. You and up to three friends play as four mercenaries as they descend into the Epsilon 9 bunker. Navigate 70+ handcrafted labyrinthine levels, purchase upgrades, and destroy chaos manifest: The Machine.
- 4
Whisperborn: Child of the Forest
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Whipserborn is a dark 2D roguelike set in a living forest shaped by sorrow. Explore procedurally generated levels, craft powerful spell combos, upgrade a mysterious hub, and uncover your forgotten soul’s truth—alone or in seamless co-op.
- 5
Tank Them All
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Chaotic top-down tank brawler for 2–6 players — local or online. Grab 16 wild power-ups, survive poison clouds and air raids, and dominate 90+ arenas across 4 game modes including King of the Hill and Golden Shell.
- 6
Qorena
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Qorena is a top-down, bullet hell, action-arena shooter of pure, survival, action! Bundled with a wide variety of multiplayer levels of bullet-raining hell, numerous monsters to fight, and the ability to customize the world!
- 7
M.O.O.D.S.
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Grab a gun and take down hostile robots corrupted by synthetic emotions! Combine weapon modifications and wreak havoc in this roguelite shooter. Let your emotions shape combat and alter boss fights! Fight alone or join up with up to 4 players!
- 8
Meowmunitions
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Meowmunitions gives you a roguelike bullet hell experience with a unique gun customization mechanic, letting you design your gun however you like. The random nature of the game, with multiple augments and artifacts, forces you to think of new and creative synergies to approach each run.