Ratchet & Clank - Going Commando - Platform: Playstation 1

Challenge mode: 
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Beat the game once. 

Mega Weapons:
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Buy from vendors in challenge mode, after getting a weapon's second form. 

Most of Secrets:
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Menu Play challenge mode 

Rest of Secrets Menu:
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See above, get all weapons second form+mods. Does not 
apply to Clank Zapper, Gagetron Weapons, R.Y.N.O II or Zodiac. 
These can have their first forms 

Ultra Weapons:
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Upgrade from Mega Weapons. 

Get skill points and visit Slim's.
Clowner           - 25 skill points 
Dark Nebula       - 15 skill points 
Insomniac Special - 29 skill points 
Lunar Eclipse     - 25 skill points 
Neutron Star      - 19 skill points 
Paint Jobs        - 3 skill points 
Plaidtastic       - 29 skill points 
Prepster          - 29 skill points 
Scoop Nose        - 18 skill points 
Silent Strike     - 15 skill points 
Solar Wind        - 15 skill points 
Space storm       - 10 skill points 
Split Nose        - 29 skill points 
Star Traveler     - 19 skill points 
Super Paint Jobs  - 10 skill points 
Supernova         - 10 skill points 
Warp Streak       - 10 skill points