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Kill all foot soldiers and enemy trucks on a Meet With Enemy sequence.
Obtain the Shin Guards, the Bulletproof Vest and the Helmet.
Obtain every weapon and weapon upgrade.
Block 100 projectiles using the claw.
Collect all twelve hidden Yashichis - one from each of Area 01 - 12.
Clear Area 02 without touching a slime blob.
Clear any of Area 1 - 12 without firing your gun.
Get to the boss of Area 05 within one minute and thirty seconds.
Acquire at least one star in each of the Challenge Rooms 1 - 56.
Hack through all the hacking games on Hard.
Acquire all database logs.
Clear the game on Super Hard.