Grargar: Humble Strategy Simulator Bundle $PWYW ($1 for Steam keys) Rebuild 3: Gangs of Deadsville (Also for Mac)
SimplePlanes (Also for Mac)
Out of the Park Baseball 18 (Also for Mac and Linux)
BTA Mad Games Tycoon (Also for Mac)
Plague Inc: Evolved (Also for Mac and Linux)
Train Simulator 2017 + Town Scenery Pack and Platform Clutter Scenery Pack
$10 Cities: Skylines Deluxe Edition (Also for Mac and Linux)
Rebuild 3, SimplePlanes and Mad Games Tycoon have both DRM-Free builds and Steam keys. The rest of the games are only available as Steam keys.
In addition, the following games have been added to the BTA tier of
Humble Jumbo Bundle 10:
Wasteland (Steam-only, also for Mac and Linux)
The Bard's Tale (DRM-Free/Steam, also for Mac and Linux)
Tormerntor X Punisher (Steam-only, also for Mac)
Train Simulator, that horror DLC freakshow, 5500 euros of DLCs. Wtf... And Cities: Skylines isn't much better either with $100 in DLCs. I wonder though if regardless I should get the BTA for Mad Games Tycoon and Plague Inc.