Single-player games like Signal Zero
Below are 8 single-player Steam games similar to Signal Zero, 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 Signal Zero page.
Ranked picks
- 1
They Are Not Friendly
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
A pixel-art horde survival roguelite on a monster-infested frontier. Dodge, shoot and stack perks to survive the swarm. Spend your loot on permanent upgrades at the General Store, then face the next run stronger. They are not friendly and you also don't have to be friendly. Keep that mutual!
- 2
Cluster - Roguelike Tower Defense
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
A roguelike tower defense game where you strengthen your single tower through a tactical cluster board. Rotate, connect, and optimize cluster cards between waves, survive 30 waves, and take on Hardcore Endless mode with online leaderboards. Will you be able to keep up with the best?
- 3
Anima Reaver
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
A 3D Sci-Fi space shooter game where you fight against big flagships and bases to unlock the secrets of the world.
- 4
Out A Space
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action with Signal Zero.
Out A Space is a fast-paced, top-down space roguelike combining arcade action with tactical fleet management. Deploy your fleet on a pre-battle grid, customize ship loadouts, and chain weapon effects to shatter enemy armadas from your flagship as you cross the galaxy to uncover an ancient secret.
- 5
Curse of Deflection
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
Curse of Deflection is an action roguelike where you bounce through a dungeon. Hit enemies with your weapons but watch out for where your trajectory leads next. Choose an adventurer and enter the dungeon to find loot and powerful weapons. Choose your build carefully because death comes at you fast.
- 6
Starcore Survivor
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Indie and Adventure with Signal Zero.
Starcore Survivor is a top-down arena auto-shooter roguelite. Move, dodge, collect materials, and shape each run through 20 waves of combat, upgrade choices, between-wave shops, weapon fusion, evolution recipes, relics, bosses, and escalating Danger levels.
- 7
Astrum Vanguard
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
In Astrum Vanguard, a 2D horde-survival with bullet hell components, you pilot and upgrade your spaceship to defeat countless alien creatures. Survive the endless onslaught in the cosmic battlefield!
- 8
Hyper Sentinel Fusion
Single-player alternative to Signal Zero — playable solo, no multiplayer required. Shares Action and Indie with Signal Zero.
Pilot an agile starfighter to tear down alien megastructures under fire, then pull off a high-stakes heist from within before everything explodes. When you die time rewinds, sending you back to Moonbase Alpha - your hub for reinvention. Spend your bounty on epic upgrades, ready for the next run.