Greywalkers is a rather interesting game that's currently going through a kickstarter campaign, it boasts that it is the first in a series of Emergent Strategic and Tactical Turn-based 3D Role-Playing Games set in a stylish supernatural post-apocalyptic world, where parts of Heaven, Hell and Earth have merged together in an event called "The Rupture". It will be released for PC (Windows, Mac & Linux) as both Steam and DRM-free versions.