Single-player games like Synapses Invasion
Below are 8 single-player Steam games similar to Synapses Invasion, 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 Synapses Invasion page.
Ranked picks
- 1
Quack or Die
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
An incremental run-based game, where kicking ducks is key to your survival! Pick a robot, work your way through the upgrade tree, play the claw machine and slots, destroy evil ducks and make it to phase 10 of the experiment!
- 2
Cyber Wukong
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Neo Journey West is an exhilarating Roguelite action game! Here, immortal arts are black tech, and magical treasures are cybernetic creations. Enter a twisted West world of data, steel, and incense. Forge your combat style and face the mechanical Buddha, chanting scriptures and wielding a gun
- 3
Chronoseum
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
An action roguelite where you fight through arenas and unlock epic upgrades! Defeat the Bosses and challenge the Emperor. Die, upgrade, die and descend again.
- 4
Forecast Death
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
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.
- 5
ガッチャ！サバイバー
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action with Synapses Invasion.
A roguelike action game where you absorb bullets to fight. Switch between Light and Dark, turn bullets into energy, and unleash powerful bursts! Build your skills and survive the overwhelming bullet storm.
- 6
Neon Carnage
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action with Synapses Invasion.
Outrun the law. Destroy everything. Survive an escalating cyberpunk manhunt in this explosive vehicular roguelike.
- 7
OKTORAID
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
A 2-player local co-op base-defense survivor. You're wired together by a power cable — stay close to share power and hit harder. Scavenge scrap, build a fortress of turrets and walls, then survive OKTO's endless robot siege. Fully solo-playable. Couch co-op & Remote Play Together.
- 8
I'm No Demonlord
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
"I'm No Demonlord" is a Roguelike shooter bullet hell game. High freedom in mechanics leads to unique playthroughs. As a demon-possessed hero, battle enemies, grow, and unveil dark schemes. Can he accept his new role? Save "kinds" or destroy "outsiders"? Good or evil? The choice is yours.