See the Unreal 4 engine in action in this trailer for Primal Carnage Genesis.
Houdini Engine for Autodesk Maya
SideFX have released Houdini Engine for Maya, with 3ds Max and Unreal versions coming soon.
Super Mario Bros - Gulf of Mexico
Jonathan Fletcher has created an incredible reimagining of the famous Mario and Luigi video-game characters.
3dmotive - Game Asset Tutorial
There's a new game asset tutorial at 3dmotive, focusing on creating a briefcase game asset to be used in the Unreal engine.