gather round the beer-slicked, noirish bar table, pull up a soft-backed seat, hunker down in the dim light, light your cigarette (make sure to let the smoke curl away dramatically for a couple second for maximum pretentious effect) and share your gaming war stories with your shadowy comrades.
Okay, here's the real description. Pretty self-explanatory: the things that have happened to you or you've participated in that you cherish most closely. This can be funny, epic, dramatic, or all three, whatever, or just something you do in a game that you're super proud of.
Was it that time a teammate sacrificed himself to save you on Dota 2, the Demoman on TF2 you tricked into blowing himself up with his own sticky bombs, the enemy wraith tank on Halo that you single-handedly destroyed, the bank robbery on GTA online gone horribly right, or the tale of the skyscraper on Battlefield 4 whose supports you knocked out and tipped over on the enemy team's base?
Etc., as long as it's on a multiplayer game and it's a relatively positive experience that makes you happy thinking about it.