Three developers, one city overrun by organized crime, and a lot of innocent people wrongly thrown in jail. A deduction game from a three-person indie studio in Bristol, UK, has taken off right out of the gate.
Developer Gilded Rune Games and publisher Yogscast Games announced that Dupery: A Game of Solo Deduction, a single-player deduction roguelite released on October 15, recouped its entire development cost within a day of going on sale.
[Related Article] Solo Social Deduction ‘Dupery’ Launches on Steam on October 15
21 Million Investigations in a Week
Player data from Dupery’s first week shows just how popular it has been. In the seven days after launch, players carried out 21 million investigations and made 7.7 million arrests.
The developers noted, with some amusement, that a good number of those arrests were of innocent people rather than the actual culprits. The detailed stats paint a vivid picture of the battle of wits.
Players solved 2.5 million cases tied to the sprawling crime syndicate, 1.5 million of them without a single mistake. On the other hand, players also died 1.75 million times in the course of their investigations, a testament to the game’s bite.
Elsewhere, 26.6 million casino chips were spent in pursuit of leads, and 3.2 million units of fuel were burned getting around the docks.
Sharing the first-week results, Gilded Rune Games and Yogscast Games said: “A heartfelt thank-you to players around the world, content creators, media, playtesters, and our Discord community, which has been an incredible source of support since the demo.”
Social Deduction, Reimagined for One Player
Dupery takes the tension of social deduction, the Mafia-style genre usually played in groups in person or online, and rebuilds it as a single-player roguelite.
As a detective hunting the crime syndicate gripping the city, players are assigned procedurally generated cases every run. They gather suspects’ alibis and statements, cross-check them against the evidence, and pick apart cleverly constructed lies piece by piece.
The heart of the game is accountability for your judgments.
Arrest an innocent civilian on a hunch without proof, and your reputation as a detective takes a serious hit. The system is built around proving your reasoning with solid evidence rather than guessing the culprit on instinct.
Indie-focused outlets covering the game in September introduced it as a promising project from three developers in Bristol: Matt, Luke, and Lydia.
The game also caught players’ attention early through its standout demo at Tiny Teams, the well-known Steam event spotlighting small development teams.
Who This Is For
Strong fit for: fans of social deduction games like Werewolf or Mafia who want to play solo; detective and mystery lovers who enjoy cross-referencing alibis and evidence; roguelite players who appreciate procedurally generated, replayable cases; anyone who enjoyed Return of the Obra Dinn or The Case of the Golden Idol-style reasoning.
Less ideal for: players who prefer action or multiplayer social play.
What to Watch For
Recouping a full budget on day one gives this small team room to grow. Watch for post-launch updates, new case types, and whether Dupery expands to more platforms on the back of its strong start.
The Takeaway
Dupery is the kind of indie success story the industry loves to see: three developers in Bristol, a clever twist on a group genre, and a standout demo that turned into a launch strong enough to pay back development in a single day. Twenty-one million investigations and plenty of wrongful arrests later, it’s already one of this autumn’s strongest indie breakouts.
Available now on Steam (Windows, Mac).
‘Dupery’ Title and First Week Performance Summary
| item | Details and Metrics |
|---|---|
| Title | Dupery: A Game of Solo Deduction |
| Development / Distribution | Gilded Rune Games (3-person development team from Bristol, UK) / Yogcast Games |
| Release Date / Platform | October 15, 2026 / PC Steam (Windows, Mac support) |
| Genre characteristics | Single-player social deduction, deduction roguelite, procedural event generation |
| Key Box Office Indicators | Full recovery of development costs on Day 1 of release |
| Cumulative investigation / Arrest | 21 million / 7.7 million (including mistaken arrests) |
| Organizational Case Resolution | Total 2.5 million (of which 1.5 million were Perfect Clear) |
| In-game deaths / currency | Cumulative deaths 1.75 million / 26.6 million casino chips, 3.2 million dock fuel consumed |
| Steam Page | Shortcut |
