Some years ago I made a bunch of characters for "The Pit", a running game for Android/iOS, based on some awesome provided concepts.
Since I'm such a cheap bastard, was only able to play it today on a device, have some fun unlocking them at:
https://play.google.com/store/apps/details?id=com.ketchapp.thepit
Here are some previews of the characters. Final renders to use in-game were much smaller than these previews, so those are actually large :)