On April 15, in case you've forgotten, Bungie's second map pack for Halo 3 launches onto Xbox Live for download and the developer's taking us in deep in a new video.
In addition to featuring in-game footage of the levels, there's chat from designers and artists that have worked on the maps about design (funnily enough) and technical features. It's viewable in our video player.
Halo 3 Legendary Map Pack will set you back 800 Microsoft Points when it releases, and includes maps Avalanche, Blackout and Ghost Town.