A screenshot on NeoGAF seems to suggest a sequel to multiplayer zombie shooter Killing Floor and a PC version of the handheld Batman: Arkham Origins Blackgate are both making their way to Steam in the future.
The shot was taken from Steam's game stats page, which briefly showed stats for a number of unreleased games. You can see the full list.
Among the list were several developer versions of released games, as well as a few unidentified titles that may be codenames for upcoming releases.
Among the other games listed were:
- BattleBlock Theater - Happy Wars - Pac-Man Museum - Half Minute Hero 2 - Toy Soldiers Complete
- BattleBlock Theater
- Happy Wars
- Pac-Man Museum
- Half Minute Hero 2
- Toy Soldiers Complete
The leak is not confirmation of course, but we'll keep our eye out nonetheless.