The single biggest change is Devil Within mode. This is the fourth installment in the Tekken Force series (the first two instalments can be found in "Tekken 3" and "Tekken 4" respectively. The third instalment was released as the "Tekken" spin-off game "Death by Degrees"). Similar to "Death by Degrees", 'Devil Within' focuses solely on one playable character, Jin Kazama. This is a traditional platform game in which players must guide Jin through a series of labyrinth style levels and entire enemy armies. This mode features bosses, such as True Ogre (from "Tekken 3"), who is not playable in "Tekken 5".