Seven under-rated single player epics for the long weekend

OXM's Edwin writes: "The sun is shining, there's a half-finished copy of Bioshock Infinite back home, I've got a third-hand 3DS in the post (it cost £80 – sucks to be you, launch buyers!) and another long Easter weekend is upon us. How are you spending yours – engaging in religious ceremonies? Decapitating make-believe rabbits? Dying of chocolate? Visiting your drunken excesses on relatives? Or playing videogames?"