When you complete certain tasks in the game new weapons and equipment becomes available for your personal arsenal.

Unlock Bottle Rocket Launcher:
Complete the Nerds Challenge

Eggs in your Room:
Complete the Task 'The Eggs'.

Skate:
Complete the Task 'Defend Bucky'.

Unlock Slingshot:
Complete the Task 'The Setup'.

Unlock Spray Can:
Complete the Task 'Tagging'.

Unlock Camera:
Complete the Task 'Hattrick vs Galloway'.

Unlock SpudGun:
Complete the Task 'StrongHold Assault'

Unlock Super Slingshot:
Complete the Task 'The Candidate'

Do FireCrackers in your Chemical Kit:
Complete the Class Chemistry 1.

Do Stink Bombs in your Chemical Kit:
Complete the Class Chemistry 2.

Do Itching Powder in your Chemical Kit:
Complete the Class Chemistry 3.

Unlock Digital Camera:
Complete the Class Photography 4

The following is a list of locations in no particular order of where the Transistors can be found in the game.

1) In Bullworth town behind the Mexican restaurant which is next to the bike shop.

2) On the table which is on the right side of the door to the upstairs in the 'Nerd Challenge'.

3) On the table next to the fire extinguisher in the boiler room in the 'Help Gary' mission.

4) On the ground before you enter 'The Tenements' building.

5) At the Bullworth dam in the 4th photography class.

6) On the autoshop roof.

Here's how you get into the girls dorm without anyone spotting you, you've first got to fill up the Yearbook to unlock the Black Ninga costume and then enter the dorm. To remain unseen by the staff you have to keep the yellow bar at map at 0%. The girls will be able to see you regardless though.

During gameplay enter the following codes using the controller in the second port. ALL codes except the clothes one must have L1 held down whilst inputing them.

Refill Ammo to Max Capacity:
Hold L1 and press Up, Up.

Unlock Full Health (Except Kissing Level):
Hold L1 and press R2, R2, R2.

Unlock ALL Weapons:
Hold L1 and press Up, Up, Up, Up.

Unlock Infinite Ammo Toggle:
Hold L1 and press Up, Down, Up, Down.

Massive Money Gain:
Hold L1 and press Triangle, Square, Circle, X.

Unlock ALL Gym Grapple Moves:
Hold L1 and press Up, Left, Down, Down, Triangle, Square, X, X.

Unlock ALL Hobo Fighting Moves:
Hold L1 and press Up, Left, Down, Right, Triangle, Square, X, Circle.

Unlock ALL Clothes:
L1, L1, R1, L1, L1, L1, R1, R1.

During a game of Dodgeball press L2 to bring up the 'Help' screen just before an opposing player has the ball and while the help screen is up your players won't be knocked out if they get hit. The ball will bounce harmlessly off your player allowing you to pick it up and go on the offensive.

Enter the following solutions to pass the English class quickly.

English Class 1:
Puzzle - Create 7 words from the letters E, L, M, O, L, W.
Ole, Owe, Owl, Lowe, Meow, Ell, Elm, Low, Mel, Mew, Moll, Well, Mellow, Mol, Mow, Mewl, Mole.

English Class 2:
Puzzle - Create 14 words from the letters T, H, F, S, G, I.
This, Fight, Gifts, Its, Sit, Figs, Fish, Fist, Fits, Gift, Gist, Fig, Shift, Sight, Fights, Fit, His, Hit, Hits, Sift, Sigh.

English Class 3:
Puzzle - Create 15 words from the letters E, L, I, S, S, M.
Miss, Semi, Sims, Slim, Isles, Elms, Isle, Isms, Leis, Less, Lies, Lime, Mess, Mile, Mils, Limes, Miles, Seism, Semis, Slime, Slims, Elm, Ism, Lei, Lie, Mil, Smile, Slimes, Smiles.

English Class 4:
Puzzle - Create 19 words from the letters R, A, O, C, Y, N.
Coy, Cry, Nay, Nor, Oar, Ran, Ray, Roc, Yon, Any, Corny, Crony, Rayon, Crayon, Arc, Can, Car, Cay, Con, Corn, Cory, Cyan, Narc, Racy, Roan, Yarn, Acorn.

English Class 5:
Puzzle - Create 22 words from the letters D, G, R, A, G, E.
Raged, Gag, Rag, Red, Aged, Dare, Dear, Age, Are, Dag, Ear, Egg, Era, Erg, Gad, Read, Agger, Grade, Drag, Dreg, Egad, Gage, Gear, Grad, Rage, Dagger, Ragged

Play 'Consumo', 'Nut Shots' or 'Monkey Fling' getting hi-scores and finishing 1st in ALL the races in Future Street Race 3D' and 'Future Street Race 2165'.

Complete ALL the Carnival Circuit races then complete the additional Go-Kart races to get the go-kart which you will find near your garage next to the autoshop.

Find the 6 different Transistors to be able to unlock the corresponding moves.

Unlock Uppercut - Hold Square:
Find Transistor 1 and bring to the Hobo

Unlock Leg Sweep - Square, Hold Square:
Find Transistor 2 and bring to the Hobo

Unlock Side Kick - Square, Square, Hold Square:
Find Transistor 3 and bring to the Hobo

Unlock 5 Punch Combo - Square, Square, Square, Square, Square:
Find Transistor 4 and bring to the Hobo

Unlock Roundhouse Kick - Square, Square, Square, Hold Square:
Find Transistor 5 and bring to the Hobo

Unlock Overhead Punch - Square, Square, Square, Square, Hold Square:
Find Transistor 6 and bring to the Hobo

Successfully complete the following missions to unlock the corresponding girlfriend. When you kiss them you will receive a health bonus.

Unlock Beatrice:
In Chapter I complete the mission 'That Bitch'.

Unlock Pinky:
In Chapter II complete the mission 'Carnival Date'.

Unlock Lola:
In Chapter III complete the mission 'The Tenements'.

Unlock Mandy:
In Chapter IV complete the mission 'Discretion Assured'.

Unlock Zoe:
In Chapter V complete the mission 'Smash It Up'.

When you have successfully completed the requirements for the clothing they are automatically unlocked and put in your closet in your safehouses.

Unlock Wrestling Uniform:
Beat Gym 1.

Unlock Grotto Master:
Collect ALL G&G cards.

Unlock Gnome Costume:
Smash ALL the garden Gnomes.

Unlock Tiny Swimsuit:
At the Beach House location find the Preppie with a blue mission on the beach and beat his swimming time.

Unlock Jimmy's Skeleton Halloween Costume:
When you hav beat the mission 'The Candidate' the mission 'Halloween' will open up which unlocks the costume.

Unlock Pumpkin Head:
Destroy ALL 27 pumpkins during 'Halloween Event'. They are located around the school and inside the main building.

Unlock Dunce Hat:
Go to the boys locker room in the gym and turn on ALL the showers.

Unlock Red Ninja Outfit:
Complete the Big Prank task during Halloween at Bullworth Academy.

Unlock Boxing Outfit:
In Chapter 2 beat either 'Boxing Challenge' or 'Prep Challenge'.

Unlock Fast Food:
In Bullworth Vale complete the Burger Joint errand.

Unlock Crash Helmet:
At the Carnival place 1st in the Kart Race.

Unlock Edna Mask:
During Halloween destroy 19/19 Tombstones.

Unlock Green Ninja Outfit:
Make 1,000 projectile hits.

Unlock Gold Suit:
Buy ALL the clothing in the game.

Unlock Black Ninja Outfit:
Fill up your yearbook completely.

Unlock Black Skate Shoes:
Travel at least 50km on foot

Unlock BMX Champion:
Complete one of the bike races.

Unlock Firefighter's Helmet:
Pull the Fire Alarm 20 times

Unlock School Mascot:
In Chapter 4 beat 'Nice Outfit'.

Unlock Orderly Uniform:
In Chapter 5 complete 'Finding Johnny Vincent'.

Unlock Pirate Hat:
On the island near the Beach House beat up the pirate.

Unlock Prison Uniform:
Beat ALL the detention mini games at least once.