Games have always been subject to getting hacked, and while in today's world of online gaming that usually is a bad thing, it can occasionally be a fun and interesting thing. In the case of any kind of Halo hacking though, very very rarely is there any kind of silver lining. This case though definitely falls under interesting. It seems as though some modders somewhere were able to reskin Valhalla with snow to resemble Avalanche. While there are no signs of any reskinned vehicles, the reskin of the map itself gives the thing an almost "Assault on the Control Room" feel that we felt gamers would be able to appreciate. According to the source of the pics the creator must have a dev kit, so this could be a personal project for some smaller dev (or just a really lucky modder). A few Bungie employees even stopped by the thread to check it out and give their opinions (not overly impressed). While modding will always be a controversial issue, it seems hard to find any faults with fun projects like this.
Gallery: Snowy Valhalla