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.
Almost got the title screen finished and I will release Alpha v.0.1 soon. Right now I'm making the final touches and soon I will start voice acting for Cubis with my sister.