Cartoon show about blocks that fall from the sky that if you get caught in them you have to play the 'game' if you lose you where never heard from again

Sounds like the CG animated
series,.

Reboot

Bob the guardian defended the system of Mainframe from threats such as the viruses Hexadecimal and Megabyte, fought in video games brought into Mainframe by The User, and repaired random system damage. The User was thought of as a deity by the Mainframers.Dot Matrix ,the business minded sprite often helped Bob with a well thought out plan of action, while her eager younger brother Enzo tagged along.

In following seasons shown on CN Bob must make an alliance with Megabyte and Hexadecimal after Mainframe is left open and vulnerable to the net due to a portal ripped in Mainframe. Megabyte double crosses Bob and sends Bob through the portal into the net without a means to get back. Young Enzo Matrix must step up and become Mainframe's new guardian.

Enzo enters a violent Mortal Kombat-like fighting game and finds himself in over his head. Enzo loses. He, Andraia and his dog Frisket stay inside the game and are taken away as it leaves Mainframe.

The following season jumps ahead and follows the adult Enzo (now a muscle-bound bruiser called Matrix) Andraia and Frisket as they search for Bob and a way to get home to Mainframe.


view intro (http://www.youtube.com/watch?v=fuEJWmxWkKw)

No. It wasn't a 3d show it may have been a cartoon? I think the blocks sent you to a different time or something like that, because he was a young boy in ep 1 but an adult in ep 2. sorry I was told this by my sister today but thank you for trying