Activate the following cheats by entering the corresponding sequences of buttons at specified screen in the shop:

CHEAT FUNCTION - CHEAT CODE
Mini-gun - At the "Cheats" menu, press DOWN, LEFT, RIGHT, UP, RIGHT, UP, LEFT, DOWN
Ultimate lightsaber - At the "Cheats" menu, press RIGHT, DOWN(2), UP, LEFT, UP(2)
Lightsaber Throw - At the "Combat UPgrades" menu, press LEFT(2), RIGHT(2), UP, DOWN(2), UP.
Spider Droid - At the "Droid-Jak UPgrades" menu, press UP, LEFT, DOWN, LEFT, RIGHT, LEFT(3).
Big head mode - At the "Cheats" menu, press UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, DOWN, UP .

ACHIEVEMENT - HOW TO UNLOCK
Refresher Course (10 points) - Complete the Prologue Mission - Master & Padawan.
Girl Power (15 points) - Complete all Jedi Missions as Ahsoka.
Double Trouble (10 points) - Perform a Droid-Jak at the same time as your partner.
Act 1 Padawan (10 points) - Complete all Act 1 Missions on Padawan Difficulty.
Act 1 Master (15 points) - Complete all Act 1 Missions on Master Difficulty.
Nobody messes with... (30 points) - Complete all Clone Missions as Cad Bane.
Droid Hopper (15 points) - Destroy 25 Droids by Jumping from Droid to Droid.
Act 2 Padawan (10 points) - Complete all Act 2 Missions on Padawan Difficulty.
Act 2 Master (15 points) - Complete all Act 2 Missions on Master Difficulty.
Two's company (10 points) - Complete a mission with another Player.
Dance of Death (15 points) - Destroy 25 droids while they are dancing.
Act 3 Padawan (30 points) - Complete all Act 3 Missions on Padawan Difficulty.
Act 3 Master (90 points) - Complete all Act 3 Missions on Master Difficulty.
Heroic Alliance (15 points) - Complete a mission in co-op with a combined score of over 10000 points.
Youngling Award (15 points) - Get at least a Bronze Medal for every challenge.
Republic Heroes (30 points) - Complete all missions with another Player.
Master Award (30 points) - Get a Gold Medal for every challenge.
Jawa Scavenger (10 points) - Collect an Artifact.
Jawa Hunter (10 points) - Collect 25 Artifacts.
Jawa Lord (30 points) - Collect 50 Artifacts.
Come back soon (10 points) - Buy a Hat or Mask.
Combat Master (15 points) - Buy all Combat upgrades.
Droid Master (15 points) - Buy all Droid-Jak upgrades.
Dance Master (15 points) - Buy all Droid Dancing upgrades.
Can't Touch Me (15 points) - Defeat Kul Teska on Behpour without either player dying.
Dressed for Success (30 points) - Buy every Hat & Mask.
Jedi Knight (15 points) - Get a Gold Medal on a Jedi Mission.
Clone Captain (15 points) - Get a Gold Medal on a Clone Mission.
Jedi Master (30 points) - Get a Platinum Medal on a Jedi Mission.
Clone Commander (30 points) - Get a Platinum Medal on a Clone Mission.
Droid Disruptor (10 points) - Get over 250 points while controlling a single droid.
Demolition Derby (15 points) - Destroy over 100 droids with Droid-Jaks.
Droid Dynamo (15 points) - Get over 100 points while controlling each type of Droid.
Dynamic Duo (15 points) - Complete all Jedi missions as Anakin & Ahsoka.
High Achiever (30 points) - Get a total score of over 200,000 points.
Time to kill (30 points) - Get a combined best time for all missions under 200 minutes.
Scrap Lord (30 points) - Destroy 5000 droids.
Campaign Veteran (90 points) - Get a Gold Medal for every mission.
Bowling Master (15 points) - Destroy 10 Droids with a rolling Destroyer.
My Hero (15 points) - Destroy 10 Droids attacking your partner.
Force Crusher (15 points) - Destroy 50 Droids with a mounted Force Kill.
Watch your step (15 points) - Push 50 enemies off an edge to their doom.
Grand Slam (15 points) - Destroy 25 Droids by doing a jump attack off another character.
Up close and personal (15 points) - Destroy 50 droids with a clone melee attack.
Tag Team (15 points) - Destroy 100 droids your partner has stunned.
Handle with care (15 points) - Destroy 20 droids with explosive props.
I got one! (10 points) - Destroy a Gold Droid.
Gold Leader (15 points) - Force Kill one of each type of Gold Droid.
No Favorites (15 points) - Destroy at least one droid with each Droid-Jak.