Cloned Cube is a Portal mod. It takes place after GLaDOS' fall in Portal. You assume the role of Chell's secret clone. You have to escape or else you may just be tested to death. There is one obstacle. CUBiS is trying to kill you.
A little physics fun in vein of Half-Life 2 for Cloned Cube. Video effects obviously applied. Cloned Cube Alpha .2 is coming soon!
Better quality video on YouTube: Youtube.com.
I don't know what I just saw, but I like it :D