Single-player games like Sigma Impact
Below are 9 single-player Steam games similar to Sigma Impact, 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 Sigma Impact page.
Ranked picks
- 1
Rocket!
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Destroy enemy ships, blast away asteroids and unlock new weapons / ship abilities in this endless arcade roguelite. Earn resources through each of the 7 game modes to upgrade your weapons to outlast them all.
- 2
GONNER2
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
In this sequel to GoNNER: Journey your way through deep dark chaotic places with unimaginable sparks of colour as you go on a mission to help Death rid a mysterious presence from her lair. Battle crazy bosses, lose your head (a lot), in this messy, cute, fast-paced procedurally-generated platformer.
- 3
Freaky Awesome
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Freaky Awesome is a hectic action rogue-lite. You explore a randomly generated old factory, fighting weird monsters and avoiding traps. Toxic wastes will make you mutate, gaining different powers every time. You will need to adapt to your mutations to survive!
- 4
Kill to Collect
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Welcome to the last city on Earth. Earn your keep and die trying in Pieces Interactive’s cyberpunk action rogue-like, featuring 1-4 player co-op. Travel down the sleepless cesspool of murderous vagrants and cybernetic freaks, as you slice and dice your way to the lower levels of Geoshelter Alpha.
- 5
Legend of Dungeon
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Legend of Dungeon is a randomly generated action RPG Beat'em'up with heavy Rogue-like elements, striking visuals, and dynamic music.
- 6
Streets of Rogue
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Fight, sneak, and hack your way through randomly generated cities. It's like Nuclear Throne meets Deus Ex, mixed with the anarchy of GTA. Rogue-lite meets immersive sim, and goes completely insane.
- 7
Catacomb Kids
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Catacomb Kids is a brutal platformer roguelike that pits you against the deadly Catacombs aided only by magic, steel, and your quick reflexes. Traverse procedurally generated dungeons and hack, slash, burn, and blast your way through hordes of things that want to kill you.
- 8
CRYPTARK
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Cryptark is a 2D sci-fi shooter where you take on the role of a heavily armed privateer seeking to earn government contracts by boarding deadly alien space-hulks. It's up to you to strategize a plan of attack, pick an equipment loadout, and destroy the central core to be victorious.
- 9
Hammerfight
Single-player alternative to Sigma Impact — playable solo, no multiplayer required. Shares Action and Indie with Sigma Impact.
Hammerfight is about 2D battles of flying machines equipped with various slashing, piercing and blunt weaponry.A unique combat system is based on realistic physics simulation, and it ties the movements of the rider to the movements of your mouse. As you wave the mouse, your rider swings his warhammer, smashing the foe into the wall!