Ratchet & Clank: Going Commando

Defeat the Megapede
As soon as the Megapede comes out, use the rhino 2 and hold down the O button to defeat him.
(Thanks to Popeye1@sympatico.ca)

Get Mega Weapons, Shortcuts to Battle Arenas, Hover Bike Races and Battles, and First-Person Mode
Complete the game once.
(Thanks to Mr X)

Skill Point Rewards
5: Big Head for Ratchet
7: Tux Skin for Ratchet
10: Big Head for Clank
12: Mirror Levels
15: Big Heads for NPC's
20: Clown Suit
25: Big Heads for Enemies
30: Beach Boy
(Thanks to Mrman@ptsi.net)

Snow Skin
Finish all 60 levels in impossible arena.
(Thanks to Mrman@ptsi.net)