To keep themselves entertained, they reached across time and space to pluck the greatest warriors from across the universe and force them into eternal combat:

: Critics often noted that while the game was as fast and frantic as its PC predecessor, it was famously difficult to play with a standard Xbox controller, especially when trying to use the precise Railgun.

Centuries ago, the Vadrigar—the enigmatic "Arena Masters"—constructed this realm purely for their own "infernal amusement". They are god-like entities who crave the spectacle of battle and the sound of carnage.