Thick as Thieves, a stealth game developed by OtherSide Entertainment under Warren Spector, will launch on Steam on May 20, 2026, priced at $4.99, £4.99, or €4.99 [1, 2]. The game is set in an alternate-history 1910s Scottish city called Kilcairn and features solo and cooperative play.
Originally announced in 2024 as a PvPvE multiplayer stealth game, the design pivoted to focus on solo and co-op gameplay to enhance player enjoyment and lower complexity [1, 2]. Otherside Entertainment explained the change reflects their "desire to bring players into the world sooner, and to give the team the flexibility to develop additional content informed by how players engage with the game" [2].
At launch, Thick as Thieves will include an introductory campaign with 16 distinct missions, six unlockable gear items, and two dynamic, replayable maps [1, 2]. The expected minimum playtime for the campaign is about four hours [1, 2].
Otherside Entertainment was founded by Warren Spector and Paul Neurath, both veterans from Looking Glass Studios known for classic immersive sims [2]. The studio intends to release further expansions and story content, though it has not confirmed whether future additions will be free or paid [1, 2].
Players can purchase and download Thick as Thieves on Steam starting May 20, with the new solo and co-op focused gameplay marking a shift from the original multiplayer concept revealed at the game’s announcement in 2024 [1, 2].
