If you could choose only one PS3/xbox/wii game to play for the rest of your life, what would it be?

[enrageorange]

1. Heroes of Newerth

2. Halo Reach

At first I was going to pick some incredibly long rpg with hundreds if not thousands of hours of gameplay, so skyrim, but then I realized eventually i will have done absolutely everything... twice... so I need to pick a game with a competitive multiplayer.