Elder Scrolls. So I can do the restoration potion, alchemy, smithing, enchanting loop and become invincible, have infinite Mana, all the perks, dragon armor, have all the spells including the cut ones and one shot fools and eventually become the 10th Divine. Then kill the other 9 and take their power, highlander style. Then learn all the shouts so I can slow down time, summon storms and dragons and shit. Then become so meta that i get access to the in game console after which it's basically GG.