Single-player games like ONCE / однажды
Below are 8 single-player Steam games similar to ONCE / однажды, 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 ONCE / однажды page.
Ranked picks
- 1
《失调～Dissonance》
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Adventure with ONCE / однажды.
A fan-made game based on the K-pop group NCT, where you play as different members, carrying out various missions until you uncover the secrets of a hostile organization......
- 2
Humanity Lost
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Adventure with ONCE / однажды.
Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.
- 3
Exit Error
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Indie with ONCE / однажды.
In this game, if you die, instead of starting over, you move on to the next level. Or something like that.
- 4
Everlasting Guilt
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Indie with ONCE / однажды.
if you’re into Doom, Furi \ Titan Souls, this game will fulfill your needs with its FPS, fast-paced gameplay that heavily focuses on Boss fights, each with a unique approach that has its own mechanics, and a load of enemies to unleash your anger and test your arsenal upon.
- 5
Rusty's Day Off: Episode One - Janitor on Duty
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Indie with ONCE / однажды.
Rusty's Day Off is a stylized FPS with puzzle elements in which you play as Rusty, a janitor, facing his own rogue robots. You'll have to fight, solve puzzles, and jump & run all over the place to get through this day.
- 6
Facility 37
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Indie with ONCE / однажды.
Explore an abandoned research facility, uncover evidence of horrific experiments, and escape alive. Complete randomized objectives with your team while evading bio-engineered threats in this atmospheric co-op horror experience.
- 7
METRO 2039
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Adventure with ONCE / однажды.
METRO 2039 is the next landmark FPS from acclaimed storytellers, 4A Games. Journey into the dark heart of post-apocalyptic Moscow in a harrowing conflict for the very soul of the Metro.
- 8
ESCAPELAND
Single-player alternative to ONCE / однажды — playable solo, no multiplayer required. Shares Action and Indie with ONCE / однажды.
Philosophical parable in the action‑adventure genre. Nikolaj finds himself in the Valley of Life — an oasis in the wasteland where clans wage a ruthless war for resources. Find allies and decide what matters most to you: helping people or profiting from their suffering?