This stage can only be accessed after completing Tekken Force three times, and is not accessible after Doctor Bosconovitch has been rescued. Doctor Bosconovitch is fought in a dark stone floored room.

Final Stage: Underground ( Under The Ground in the Japanese version).A traditional Japanese castle, where Heihachi Mishima is fought.

A suspension bridge in a blue lit underground cavern.

Stage 3: Darkness ( In The Dark in the Japanese version).

Stage 2: Badlands ( The Wilds in the Japanese version).

A run-down city street with small shops that have names in English.

Stage 1: Backstreets ( A Back Street in the Japanese version).

Defeating Doctor Bosconovitch will prompt an end screen that says he has been saved. The player progresses to the Mishima Fortress, where Heihachi seems to be keeping Doctor Bosconovitch a prisoner. In the game, four different ranks of Tekken Force soldiers are fought, progressing in difficulty and rank from Crow, Falcon, Hawk, to Owl. If beaten, he is then unlocked as a playable character. When Tekken Force is beaten a fourth time with yet another new character, Doctor Bosconovitch can be fought as a secret boss. The first time the player beats Tekken Force, they will be given a key, and the next two successful completions add two more keys, up to three. If the player chooses Mokujin however, every boss including the fourth stage boss will be Mokujin. The boss the player fights against in each stage depends on which character the player chose, with the exception of the fourth stage where the boss is Heihachi Mishima. At the end of each stage is a boss character from the playable roster.

The player controls their chosen character through a side scrolling mini-game, fighting against the Tekken Force through four stages.

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