The Gold Edition has an enhanced version of the origanal game and the Millenium Expansion Pack. It also comes with the game guide from Prima Publishing. The updated origanal will include pumped up graphics, new FMV's, and the Rebellion team coaching you through when playing as the marine. It is to be stressed that this is not an entirely new game. It doesn't have new bots or single player levels. The expansion pack will have nine new levels for multiplayer and skirmish. They will be Nostromo, Lab 14, Elevator, Hadley's Hope, Compound, Leadworks, Subway, Meat Factory and Rebellion Offices. If you own the origanal you can buy it for 10$ + shipping and handeling. Otherwise you can buy in the store. It is 30$ at Software Etc.

Here are some screenshots from

Avault

The last three shots are from PCZone.com.

Box Shots

I've now seen the real box. The front is the same, but the back is diferent. There is also an inside flap.