Single-player games like Syndeo-Complex
Below are 8 single-player Steam games similar to Syndeo-Complex, 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 Syndeo-Complex page.
Ranked picks
- 1

Mekkablood: Quarry Assault
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
The Year is 2082. You play the role of Bill, a grizzled, and extremely hairy robojockey. It's up to you to take the reigns of Bill's Mekk, with your friend Rusty, to get your revenge against TorxCorp, who's trying to steal your mining claim.
- 2

TECTON
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
TECTON is a sci-fi action-adventure set in a metropolis turned machine fortress. Control a powerful robotic body as you dodge relentless projectiles and tear through enemy strongholds on your mission to confront the force behind the city’s downfall.
- 3

Invasion Resistance 2
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
A PC first-person shooter game with a short single-player campaign containing 13 maps and several cut-scenes.
- 4

Project RAZE: Fall of Terra
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
Step into a fast-paced sci-fi FPS where time replaces health. Fight through the campaign or dominate global leaderboards as RZ-01, humanity’s greatest weapon, RAZE.
- 5

Uploaded
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
Uploaded is a fast-paced, parkour, online multiplayer, and single-player shooter created by only one developer where you play as a robot with a human mind uploaded to it.
- 6

Steel Wake
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
Steel Wake is a rogue-lite mech FPS takes place in a future locked in a perpetual war. Pilot a siege mech capable of large-scale destruction. Push through enemy defenses and cause havoc with overwhelming firepower.
- 7

Powerfuel
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
Powerfuel is an action FPS set in a gritty dieselpunk world. Play as the legendary ex-criminal known as the Cricket, and harness the mystical properties of powerfuels. Fight your way through the gangs of New Lyon and shed light on the conspiracy plaguing the city.
- 8

The Multiverse Trilogy
Single-player alternative to Syndeo-Complex — playable solo, no multiplayer required. Shares Action and Indie with Syndeo-Complex.
Introducing The Multiverse Trilogy.