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
Void Strike
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Shred endless waves of hostile spaceships in a 1-bit arcade survival roguelite. Build absurd weapon combos, unlock pilots, upgrade your fighter, and survive escalating dogfights against swarms, elite enemies, and colossal bosses.
- 2
Rogue Space Convoy
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Rogue Space Convoy is a roguelite space action shooter where you pilot a fighter, build a convoy, and choose branching encounters across five hostile passages. Disable enemy cruisers, salvage upgrades, and keep the Ark alive long enough to reach the gate.
- 3
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!
- 4
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.
- 5
Salt VS Pepper
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Salt VS Pepper is a twin-stick shooter where you switch between black and white every 3 seconds, leaving behind an evil clone every time you switch! Use guns, walls, bowling balls, and anything in between as a weapon!
- 6
Slimewest
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
Face off against an invasion of slimes in this 2D roguelite with pixel art graphics. Play alone or with up to 4 friends and save the city from the devouring attack of these creatures. Get your weapon ready and embark on this bang bang western style adventure. Play now and prove your mettle!
- 7
Vectoraid
Single-player alternative to Proto Trigger — playable solo, no multiplayer required. Shares Action with Proto Trigger.
A neon retro Asteroids inspired arcade game with persistent progression, upgrades and cosmetics to unlock. With Asymmetrical local Co-op, mining extraction, Endless waves game modes and local PvP.
- 8
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.