Grargar: Humble tinyBuild Bundle with Graveyard Keeper $1
The Final Station
Diaries of a Spaceport Janitor (Not for Linux)
Hello Neighbor (Only for Windows)
Streets of Rogue (Early Access)
Party Hard: High Crimes DLC $13
Party Hard 2 (Only for Windows)
All games are only available as Steam keys, except for Hello Neighbor which is also available as a DRM-Free download. All games have Windows, Mac and Linux builds, aside the exceptions noted above.
Must have been a glitch - all are now Steam only.