Microsoft has announced that playing Rise of the Tomb Raider anytime between now and 1st December will entitle you to the "coveted" Golden Rattlesnake Revolver Skin as a free DLC. We haven't got a picture of it, because Microsoft hasn't provided one, but it sounds pretty. And gold.To celebrate the launch of the game today, there's also a promotion that will see eight fans competing in a endurance test called the Survival Billboard. Said fans will be taken to the top of a billboard in central London (Lara's hometown), where they'll face "arctic cold, intense wind, wild snowstorms and sudden heat" based on votes from the public.You'll be able to tune into the Survival Billboard live stream from 12th November at 1pm GMT. Rise of the Tomb Raider is out now for Xbox One and Xbox 360.https://www.youtube.com/watch?v=Yzl_VwrZx5g