Xi-Tiger is one of the main villains of the Treasure video game Alien Soldier. In the year 2015, the terrorist organization known as Scarlet led by Epsilon, declared war on the Sierrans until Epsilon was apparently assassinated. After Epsilon's apparent death, Xi-Tiger took leadership of the organization, and the attacks on Sierra became more frequent and brutal. Epsilon hid his soul inside the body of a boy, and when Xi-Tiger finds Epsilon, he takes a young girl hostage and kills her, forcing Epsilon to pursue Xi-Tiger. Epsilon later confronts and kills Xi-Tiger aboard a train in the middle of a thunderstorm, but at that point Epsilon's mission had already begun.