Single-player games like The Sirius Device
Below are 8 single-player Steam games similar to The Sirius Device, 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 The Sirius Device page.
Ranked picks
- 1
Negative Edge
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Fight across Solus in a fast-paced third-person action shooter rendered in black, white, and blood red. Chain gunplay, laser-blade combat, abilities, and grappling-hook mobility as you survive enemy arenas and uncover the truth behind your mission.
- 2
Kanka
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Kanka is a 1–4 player co-op sci-fi action RPG / third-person shooter. Complete missions on SP-01, fight hostile factions and alien creatures, explore its strange regions, loot and craft, shape your character build, and work together to find a way home.
- 3
Starpoint Gemini 3
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Fight, loot, explore and craft in the living open world of Starpoint Gemini 3. Assemble your trusty ship and boost your RPG skills to face all challenges.
- 4
Holomento
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Holomento is an Indie Permadeath Action-RPG focusing on the dangerous quest of passing through the mysterious Eventide Hollow – and rebuilding it step by step.
- 5
Silverwing
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Silverwing is an action flight game where you build an array of powerful spaceships to combat enemies across space and a diverse array of planet landscapes. Play through a fully voiced 20+ mission campaign with multiple endings based on your mission choices.
- 6
Myriavora
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Myriavora is a roguelike swarm action shooter in a sci-fi setting. You unleash a storm of fire and ice upon giant spiders, dodging their frantic attacks via cool moves.
- 7
Apocalypse Survivor
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action and Indie with The Sirius Device.
Days of Ruin is a third-person post-apocalyptic zombie shooter featuring procedurally generated equipment stats and infinitely replayable maps. Players can repeatedly farm maps to acquire better gear and prepare for greater challenges!
- 8
TheFlagship
Single-player alternative to The Sirius Device — playable solo, no multiplayer required. Shares Action with The Sirius Device.
"The Flagship" is a singleplayer third-person space warship roguelike game. From destroyers to battleships, choose your vessel and equip it to face node-based roguelike challenges, each adventure is a different experience. Your ship, equipment, skill level and roguelike ability build will be tested.