The epic conclusion, and it even leaves room for a sequel.

*NOTE* I decided to leave in the pre-test cutscene this time (all the other scenes had it too, but weren't very interesting). I left out the actual test though, which is just the three games (minus the unlockable one) with a time limit.

EDIT: One of the game designers is currently posting on the OCR forums and is answering questions regarding the game. The thread can be found here:
http://www.ocremix.org/forums/showthread.php?t=12834 (less info)