The youngest ever Heavyweight Boxing champion of the world becomes unlocked when you complete Career mode. Alternately he is available as a pre-order bonus, or purchase as a DLC. There will be two versions of Tyson available in EA Sports UFC 2: Iron Mike Tyson (based on his appearance when he was the Heavyweight Boxing champion during the 80's) and Legacy Mike Tyson, an older version of the boxer, complete with his trademark face tattoo.