What's the biggest achievement you've ever accomplished in a video game?

[kermdfrag]

I don't know, it is a toss up between beating the Ultima Weapon in FFVII or collecting the 100 Gold Skulltulas in Zelda:Ocarina of Time both of which dragged on for days but the feeling of achievement when I completed both tasks was immense.
I think I need to get a life! :))