I know we all have some. Maybe it was defeating the final boss, or something else. For me it would be when me and my buddy Stephen did doubles on Gamebattles. We had played it all summer of 06 and managed to get to the #1 doubles spot with a record of 47-2 or something like that. I still remember when we made #1 was the night the Ducks won the cup. Here was our logo after that (he is from Cali hence why Ducks winning deserved a logo).
Good times, would love to go back to them if I could.