The Raspberry Pi is ideal for building game machines, and we've already shown you a couple of designs which feature it. This is another impressive take on the concept, giving you an arcade machine approach in a cool see-through case.
The challenging part of 'NaCade' isn't so much the electronics as cutting the acrylic sheets to make the transparent arcade clone. That said, the Instructable put together by Krimmy walks through each stage carefully. Check it out for the full story.
NaCade - The Naked Raspberry Pi Arcade Machine [Instructables]