Diablo II was released by Blizzard in 2000, and the Barbarian was one of its original playable classes, built around melee combat and a Warcries skill tree. Those short shouts were the sound of buffs and debuffs being cast in the middle of a fight, so players heard them constantly during runs. Clips like this one were later ripped from the game files and shared on soundboards, where the roar outlived its original skill and became a general gaming charge sound for montages, streams and memes.