God Hand

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Chihuahua Race

Clear Stage 3, then talk to the male NPC in the shop to play it.

Fighting Ring challenges

Clear Stage 1.

Unlock Fighting Ring Battle 41-50

Beat the game once.

Unlock Fighting Ring Battle 51

Clear Fighting Ring Battle 41-50.

Unlock Hard Mode

Beat the game on Normal Mode once.

Unlock Jukebox A

Complete the game in any difficulty once and it will appear at the shop.

Unlock Jukebox B

Go to the casino for jackpot pulls, get a ticket to redeem the Jukebox cd.

Unlock Jukebox C

Complete the game on Hard Mode to unlock it.

Unlock Jukebox D

Complete the game on (any difficulty) with the "Kick Me" sign on the entire game without using any GodHand Reels or Godhand Power.

Unlockable Costumes

Start from second round, there'e an extra NPC in the shop, talk to him to change the costumes.

Unlockable - How to Unlock

Carnival - Beat the game once.
Karate - Beat the game once.
Devil Hand - Beat the game once.
Olivia's Bunny Girl - Beat the game once.