"GoldenEye X". Think of it as "GoldenEye 007" on steroids: they're taking the engine used to make "Perfect Dark" and they're rebuilding "GoldenEye 007" within this engine. So this means they have some really neat touches: reloading animations, new weapons, dynamic lighting, et cetera. The mod started out as a revamped multiplayer, but the modders working on the project recently added three new playable campaign missions in the latest patch.
Here's some loser nerd explaining it through video, though this probably makes it much less appealing than how I described it.
which means i won't have anybody to play multiplayer that's on here :(