Packaging

Box
A cardboard or metal box - PC games and some console games.

Keep Case
DVD style - PS2 / Xbox / GameCube / PC games.

Slipcase
DVD style outer comes with inner fold out Digipak - PS2 / PC games.

Electronic
A downloadable "cover" in place of an actual package - PC / Wireless / Xbox Live games.

Jewel Case
Plastic CD case - Dreamcast and PSX games.

Cartridge Case
Hard plastic for carts - Genesis games

Sleeve
Paper / Plastic - OEM versions (bundled with hardware) of PC games.

Promotional
Electronic press release cover and/or actual mock packaging from the publisher. Third party promo is not acceptable. NOTE: These are temporary placeholders until actual cover art is on file and then the promo version will be removed.

Other
The ones that don't fall into the above.