The Phoenix Engine is under development by Wolfire Games, it's being used to power their upcoming game Overgrowth. The Phoenix Engine aims to be easily modable and user friendly, it has built in support for rigging, animating and scripting.
Learn the basic controls of the Overgrowth map editor.
Learn how to export a model from Blender to Overgrowth.
Learn how to quickly make and use your own animations in Overgrowth.