As soon as I get my hands on the copy I'll disappear into the inner sanctum of my room, place the disc reverently into the computer -- while it installs I'll retrieve a bottle of mead (yes, actual mead -- which I'll buy the day before), an ounce of something else, and a large pile of snacks and a thermos of black coffee. Once it's done installing, I'll turn off the lights, turn off my phone, tell my girlfriend to go stay at her mother's for the weekend, and crank the volume on the speakers up real loud.
Then I'll be in a trance for the next 24 hours.
I might have to use the bathroom by then, so I'll do that and then go back to gaming after getting a few cans of energy drink from the fridge. Then game game game.