Lastest : When I defeated the overpowered wyrms (which.. are kind of overpowered) in Tales Of Maj'Eyal.
I tought I'd finish the game for sure this time, but I got wrecked towards the end. (losing your character hurts so much )
300 hours played and didn't finish the game. =-="
Was also pretty proud when I unlocked Oozemancer or when I first defeated the master on roguelike difficulty.
I got the feeling in WoW when my raidgroup had defeated Blackwing back in Cata. (was the last healer standing!) (we sucked and actually never managed to down ragnaros )
Alot of the Demon Souls and Dark souls boss also gave me that feeling, not necessarily the last one tho.
(Tower knight, Flamelurker, Maneaters, False King, Capra Demon, Four Kings, Gwyn, Ornenstein and Smough...)
First time I beat Risk Of Rain.
Also some more story driven games can give me the **** YEAH ! victory feeling. (Ace attorney mostly)
Mobas almost never give me the feeling, I do feel good if I dominate the game, but its just.. not the same.
Old school UT and Medal of honor sometimes when by friends get intense.
Oh and some more private stuff that involves large objects
dragonthemedonesathat