Single-player games like Synthesis of Corruption
Below are 12 single-player Steam games similar to Synthesis of Corruption, 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 Synthesis of Corruption page.
Ranked picks
- 1
Half-Life
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
- 2
Half-Life: Blue Shift
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
- 3
Beneath
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
Beneath is a Lovecraft-inspired survival FPS. Scarce ammo, merciless enemies and a sense of the unknown combine in a 10+ hour, story-driven single player campaign, built for both veteran gamers and those seeking a challenging old school experience.
- 4
Crow Country
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action and Indie with Synthesis of Corruption.
The year is 1990. It’s been two years since the mysterious disappearance of Edward Crow and the abrupt closure of his theme park, Crow Country. But your arrival has broken the silence, Mara Forest. If you want answers, you’ll have to venture deep into the darkness of Crow Country to find them…
- 5
Half-Life: Opposing Force
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.
- 6
STAR WARS™: Dark Forces Remaster
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
The evil Empire is currently creating a doomsday army behind a veil of secrecy. However, they are no match for the Rebel Alliance's covert operations division. Your mission is to infiltrate the Empire and put an end to their plans for terror and domination.
- 7
ZERO PROTOCOL
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action with Synthesis of Corruption.
In this immersive sci-fi thriller, you will experience the atmosphere of classic 3D games as you solve puzzles, follow an intriguing non-linear storyline, and engage in battles with monsters.
- 8
CARNAL
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action and Indie with Synthesis of Corruption.
CARNAL is a fast and challenging retro FPS straight from the mid '90s. The Sons of Anak are opening portals to extract Dark Matter from the "other side". Combat the possessed soldiers, the manifested demons helping them, and any inanimate objects standing in your way!
- 9
Re.Surs
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action and Indie with Synthesis of Corruption.
Re.Surs is a futuristic story-driven 2D side-scrolling shooter featuring unique heroes with various abilities. Shoot, dash, kick and hack monsters as you try to uncover the secrets of the Re.Surs dark energy and demons' interdimensional invasion.
- 10
Forrader Hero
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Indie with Synthesis of Corruption.
Forrader Hero – turn-based game with roguelike elements where heroes can’t step back and must fight through the end to save their soul in ‘Forgotten Proto.World’ fighting hordes of monsters, undead creatures, and their overlords.
- 11
Plastomorphosis
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Action and Indie with Synthesis of Corruption.
Evacuated from their hometown due to dangerous bursts of dark energy, the ordinary citizen is trying to overcome and survive a series of events in a new reality where living as a human is no longer possible as it once was. 3rd-person horror with fixed camera angles and retro-styled graphics.
- 12
Snowsquall Grip
Single-player alternative to Synthesis of Corruption — playable solo, no multiplayer required. Shares Indie with Synthesis of Corruption.
Escape the snowy nightmare or be trapped forever — your call.