I found a program that's probably as close as a 3D program is going to get to C2 called CraftStudio, it's still in alpha but its still pretty capable it seems:
http://craftstud.io/
It's pretty easy to learn and use, and also has an emphasis on online collaboration if you want to work with others. It's fairly streamlined, you can do everything within the program: scripting, make models, draw textures, sprites, animate, make levels etc.
<img src="http://polyprograms.free.fr/elisee/CraftStudio/CraftStudioRedesignMockup.png" border="0">
(screenshot of an upcoming UI redesign.)