Team-based multiplayer FPS Gotham City Impostors is going free-to-play, according to the Open Steamworks Content Description Record Database.
The database is an unofficial record of every game and subscription provided by Steam.
The listing shows a file titled "Gotham City Impostors F2P Trailer" exists on Steam.
A separate listing shows a platinum edition of the game that comes with a steampunk costume pack.
The game is currently US$14.99 (AUD$14.50) on Steam.
Publisher Warner Bros. declined to comment on the existence of a free-to-play version of the game.