To unlock Prototype Temjim for play, beat Arcade mode with Temjin. Then, at the character selection screen, highlight Temjin and press X. Highlight Random and press X. Highlight Raiden and press X(2). Highlight Bal-Bados and press X(2). Highlight Angelan and press X(2). Finally, highlight Grys-Vok and press X(3). Prototype Temjin has increased damage, but cannot use turbo weapons, air dash, or double jump.