Moving round to the back of the case, you can see how it is structured. The centre of the case is basically a very narrow ATX standard, with the PSU sitting on top and the hard drive (and fan grille) sitting below. The main chassis is made out of tough acrylic.
The side plating is held on with allen key screws. A quick unscrew will enable you to expose the guts of the case.
As you can see, there is a full size motherboard inside. Invasion has outfitted this with Foxconn's nForce 590 SLI motherboard, a Gigabyte GeForce 7950 GX2, along with an Athlon 64 FX-62 and 2GB of Kingston memory. Getting all that in to a case of this size and form factor is quite an achievement.