Bloody Roar is the first game in the Bloody Roar video game series and was followed by four sequels on multiple platforms. The game's story centers on a group of warriors known as "zoanthropes", who have the power to transform into half-human half-animal "Beasts", and the Tyron Corporation, and underground organization that seeks to use zoanthropes as mind-controlled weapons.
At the beginning of each stage, both players have a set amount of energy that is used to activate "Beast Mode", which causes the character to change into a Beast. Players may transform at any time after the letter "B" appears in the "Beast Indicator" below the players' life energy indicators. The Beast Indicator appears blue when storing the energy needed for transforming. When the Beast Indicator is fully charged, the word "BEAST" appears, and the player can activate Beast Mode by pressing a certain button. During Beast Mode, the amount of fighting moves available to the character increases, the character becomes heavier, 3% of the character's life energy recovers and the character's jumping ability increases.