Garry's Mod sandbox, so I'm basically a god. I would wake up at gm_construct_redesign (last map I played on). I can do pretty much whatever I want, even use the internet and stuff. Being the gun nut that I am, I would have a grand time with all the gun mods I have. If I still get to download mods and switch between maps, then that's even better. If I can switch between maps, then technically I can also live in any game I have mounted in gmod, so I can also live in Half-Life 2, Counter Strike Source, and just anything that you can find on the steam workshop. I think it would be pretty awesome with all the things you can do.