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
MOBU
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Survive waves of bouncing enemies raining from the skies in this fast-paced action roguelite. Play as a superpowered monk, craft game-breaking builds, and conquer the chaos in sub-30-minute runs.
- 2
Cosmic Tails
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Become the Cat Bounty Hunter. Blast off through deep space as you decimate hordes of space creatures with bounties on their heads. Upgrade unique cat-themed abilities, unlock pulverizing weapons, and survive until your contract expires -- or join the ranks of fallen bounty hunters before you.
- 3
Whisperborn: Child of the Forest
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
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.
- 4
Ocean Survivors
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Dominate the ocean! Sink enemy ships, loot their wrecks for gold, weave through a storm of cannonballs, and expand your arsenal. Level up unique builds, unlock abilities, and survive relentless attacks. Upgrade your ship and become the ultimate pirate!
- 5
MineGeon: Renegades
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Descend into the dangerous depths of PAIMO in this co-op sci-fi roguelite bullet-hell focused on resource gathering. Play solo or with friends as you fight, gather resources, and upgrade together. The deeper you go, the greater the risks, rewards, and secrets waiting beneath the surface.
- 6
Army of Survivors
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Wage war against massive hordes of orcs, undead and demons in this survival roguelite. Upgrade and combine epic weapons and talents. Enlist an army to fight alongside you. Embrace the chaos of the battlefield!
- 7
Rogue Shapes
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action and Indie with Synapses Invasion.
Rogue Shapes is a fast-paced roguelike bullet hell where you battle waves of deadly shapes, level up, and choose powerful upgrades. Complete challenges to unlock new playable shapes, each with unique weapons. How long can you survive the chaos?
- 8
RITUAL
Single-player alternative to Synapses Invasion — playable solo, no multiplayer required. Shares Action with Synapses Invasion.
RITUAL is a cyber-occult action roguelite where you survive escalating waves, forge devastating builds through sci-fi weapons, rhythm-breaking tech, and reality-altering Fonts, and battle five bosses inside the Martian terradome of TRA-3.