Ratchet And Clank - Up Your Arsenal - Platform: Playstation 2

Play as Dan:
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Connect online with the game. Press X at the select login username screen. 
Select the "Edit Profile" option. Then, hold L2 and press Left(4), Up, Right, 
Up, Left.

Play as Nefarious:
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Connect online with the game. Press X at the select login username screen. 
Select the "Edit Profile" option. Then, hold L2 and press Up(3), Left, Right, 
Up, Left, Up.

Play as Old School Ratchet:
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Have a saved game from Ratchet And Clank on your memory card to have the Old 
School Ratchet skin available at the Phoenix Starship weapon vendor.

Squat count:
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At the main menu, highlight the "Stats" option, then press Up, Down, Left, 
Right, Square. The number of times you have squatted on an opponent in 
multi-player mode will now appear on the stats screen.

Double bladed laser sword:
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Pause the game and press Circle, Square, Circle, Square, Up, Down, Left(2). The 
wrench will be replaced with a double bladed laser.

Alternate Quark costume:
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Press Up(2), Down(2), Left, Right, Circle(2), Square in any Quark Vid-Comic. 
Alternately, press Up(2), Down(2), Left, Right, Circle, Square(2) in any Quark 
Vid-Comic.

Bonus weapons:
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Have a saved game from Ratchet And Clank: Going Commando on your memory card to 
have the Lava Gun, Bouncer, Holoshield, and other weapons available to purchase. 
Additionally, successfully complete the game to get Mega versions of the weapons 
currently in your inventory from any vendor. The RY3NO will also be available 
from the first vendor on Planet Florana. Additionally, have a saved game file 
from Ratchet and Clank: Going Commando on your memory card, then go to Slim 
Cognitos for free weapons.

Weapon discount:
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Have a completed saved game from Ratchet And Clank on your memory card. Go to 
any vendor (Slim Cognitos, Phoenix Ship, etc.), then go to Gadgetron Employee 
discount. You will then receive a 10% discount on each weapon.
Sly 2: Band Of Thieves demo 
At the title screen, hold L1 + L2 + R1 + R2.

Insomniac Museum:
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Go to the teleport pad in Metrapolis between 3:00 a.m and 3:59 a.m., or at any 
time if all trophies are collected. Use it to reach the Insomniac Museum. The 
museum contains various pictures, concept art, comics, design concepts, and 
more. Note: Set the system time on the PlayStation 2 to 3:00 a.m. to do this 
easily.

Ninjas and Pirates mini-game:
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When you play the Qwark Vid Game, instead of selecting a game, press Square and 
enter "_MEGHAN_" as a password. Note: "_" indicates a space. Press Start and you 
will be transported to the Insomniac Museum where you can play a two player game 
featuring ninjas and pirates.

Bomb mini-game:
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When you play the Qwark Vid Game, instead of selecting a game, press Square and 
enter "YING_TZU" as a password. Note: "_" indicates a space. Press Start and you 
will be transported to the Insomniac Museum where you can play a four player 
game. The four players are at the four corners of a square room, with pillars in 
it. You go around and drop bombs trying to kill everyone.

Sketchbook:
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Successfully complete the game to unlock the "Sketchbook" option at the 
"Cinematics" menu. Press L1 or R1 to move through the pictures.

Challenge mode:
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Successfully complete the game to unlock challenge mode. The further you get in 
challenge mode, the more random things will be unlocked.

Infinite Inferno Armor:
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When you get the Inferno Power Boost, pause the game and go to "Skins", then 
select "Current Armor". You will then have that armor on you without it 
disappearing after the time runs out. Note: The armor will not be flaming. If 
you turn of the power when you are done playing, the armor will be gone. The 
best place to find the armor boost is in Annihation Nation.

Refill health:
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If you are low on health, find an area where the opponent cannot hit you with 
their weapons. Make sure that they are nearby (for example, on top of a pillar). 
Using the Holo Shield Glove (version 5), shoot out some barriers. The Shield 
Barriers will suck health from enemies and give them to you. This is very 
helpful in tight situations.

Refill health and ammunition:
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Start any challenge, then immediately quit.

Map O Matic:
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Successfully complete every Galactic Ranger level to get a Trophy and a Map O 
Matic. The new and improved Map O Matic shows the locations of Crystals, 
Gadgetrons, and secrets.