This clip is a user-uploaded sound effect with no documented single origin, which is common for short digital roars shared across soundboards. Sounds like it circulate as free building blocks for creators making robot, mecha and cyber-themed content, and this one gets picked for its dense electric texture. The 'roar2' naming suggests it belongs to a small series of variations uploaded by the same user. Its staying power comes from utility: a three-second mechanical roar fits anywhere a scene needs instant futuristic menace without licensing a film sample.