Single-player games like Agent Sirius
Below are 8 single-player Steam games similar to Agent Sirius, 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 Agent Sirius page.
Ranked picks
- 1
Zili Diary escape against witch
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares RPG with Agent Sirius.
Zili Diary is a psychological horror visual novel. Explore a cursed mall, make life-or-death choices, and fight to survive. Every action costs a piece of your soul.
- 2
少女的求生之路：研究所
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares RPG with Agent Sirius.
2D pixels+beautiful girl+high-definition CG+super rich plot+numerous endings! Put aside the boring and peaceful daily routine, and enjoy the life of sticking with beautiful girls to the fullest in a different world~
- 3
Rule the Dungeon
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure and RPG with Agent Sirius.
Dungeons are just another day at the office — an urban fantasy Adventure about Elysia's dungeon bureau.
- 4
Last Word
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure and RPG with Agent Sirius.
In a society where having the last word means having power over others, a small party is disrupted by a gentleman who politely issues orders via one-way intercom.
- 5
Unavowed
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure and RPG with Agent Sirius.
A demon has possessed you and used your body to tear a swath of bloodshed through New York. You are now free, but life as you knew it is over. Your only path forward is joining the Unavowed - an ancient society dedicated to stopping evil. No matter what the cost.
- 6
Corpse Party (2021)
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure and RPG with Agent Sirius.
Explore the haunted halls of Heavenly Host Elementary in Corpse Party (2021), the horror cult classic now updated for the next generation.
- 7
Blood Lily Ghoststories
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure with Agent Sirius.
A horror game about a needy female ghost. A trio of close-knit occult club girls gather late at night to enjoy telling ghost stories. Little do they know that Miss Choker, a ghost that targets girls, is just dying to appear...
- 8
Zombie Apocalypse Survival Simulator
Single-player alternative to Agent Sirius — playable solo, no multiplayer required. Shares Adventure and RPG with Agent Sirius.
From the creators that brought you The Test Trilogy & many other experiences, comes Zombie Apocalypse Survival Simulator. Will you survive in the new world? Or will you become just another victim to looters, bandits, or worst of all... The Voracious Dead. There's only one way to find out...