Tekken Tag Tournament
Armor King's alternate outfit:
Beat Arcade Mode with Armor King. Then to use the new outfit, at the character select screen choose Armor King with the Start button.
Beat Arcade Mode with any character to unlock Bonus Characters.
The order that they are unlocked is as follows: Kunimitsu, Bruce Irvin, Jack-2, Lee Chaolan, Wang Jinrey, Roger/Alex, Kuma/Panda, Kazuya Mishima, Ogre, True Ogre, P-Jack, Mokujin/Tetsujin, Devil/Angel, and Unknown.
Unlock Devil to get access to Gallery Mode.
Play as Angel:
Highlight Devil at the character select screen and press Start.
Play as Gold Tetsujin:
Win ten matches in Versus Mode to play as Gold Tetsujin.
Play as Tiger:
Highlight Eddy Gordo at the character select screen and press Start.
Start the match with second character:
Hold Tag and press Start before entering the match.
Tekken Bowl Mode:
Unlock Ogre to get access to Tekken Bowl Mode.
Tekken Bowl Mode Jukebox:
Get 200 points in Tekken Bowl Mode.
Complete arcade mode once.