Desmond's Story. The game itself wasn't that difficult, it was fun though, I loved all of it... except Desmond's End.
I'm a PC gamer, I work off of steam it only counts online time. My steam also killed itself for half a year, a year ago... It sucked. I'm probably done over 500 hours on both L4D's. Then add in nearly 100 hours of Terraria..... And I shit tonne on minecraft... Ergh, so much life wasting... But so much fun.
So you've played AC3?