Otogi - Myth of demons - Platform: XBox

Unlockable weapons:
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Black Swallow      - Kill Death Serpent behind the beginning of Stage 23 
Butterfly Staff    - Destroy some plants in Stage 10 close to the beginning and go into the hidden hallway 
Dragon Point       - Kill 30 enemies in Stage 7 
Dragon Staff       -  Finish Stage 5 with a time of 3:20 or better 
Golden Dragon      - Look in the narrow passage in the beginning of Stage 20 
Holy Staff         - Beat Stage 15 with a time of 2:47 or better 
Jaws of Mountain   - Take the narrow path to your rihgt in Stage 11 and go over the bridge 
Moonlight Sword    - Free all souls in the first 28 stages 
Ogre's Horn        - Defeat the Blaze Ogre in Stage 18 
Orchid Malevolence - Kill the Hydra in Stage 25 
Punisher           - Look at the base of the hill in Stage 6 
Rune Scimitars     - Pull off a 20-hit combo in Stage 3 
Skylarks           - Beat Stage 14 in under 2 mins. 
Staff of Duality   - Look inside a tree stump in Stage 24 
Sword of Voracity  - Kill 60 enemies in Stage 26 
Thunder            - Look under the bridge between the middle island and the statue in Stage 22 
Training Sword     - Pull off a 400-hit combo in Stage 11 

Unlock 2nd Play:
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Beat the game once to unlock the 2nd Play option. You can play the game again with 
all weapons and items carried over from your last game. You also gain the ability 
to destroy strong object with a B attack and your stats increase. 

Magic Opposites:
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Magic that opposes one another do double damage and magic from the same house does half damage. 
Byakko (Chimera) opposes Soryu (Dragon)
Genbu (Butterfly) opposes Suzaku (Phoenix) 

Completion bonus:
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Successfully complete the game and select the "Yes" option to save the cleared 
game data. The "2nd Play" option will now be unlocked. Choose this option to 
replay the game with all previous items and weapons, and a slightly higher difficulty.