The Xbox 360 case mod that you see above is the C11 XBOX360 MLG Vault. The mod is essentially a case that clips over the outside of your existing system to make it look like you’re ready for nuclear fallout.
The case offers a “lockout” system for your console, as well as a handy rack for your headset and controller, which is very nice. It costs about $90 for the full mod, but there is also a version without the mask on it for $60. Grab your own Vault mod here.