Everything everyone else mentioned. Also, you might want to get some curtains. I remember moving into my first flat and not having any curtains (for some reason I thought it came with the flat). I had to use towels and sheets to cover the windows.
EDIT: And since you're a gamer you're gonna need a kettle, at least one cup and a healthy supply of coffee and sugar/sweetener and cremora if you don't have a fridge.







