LAPOSTAL ---- Add Weapons, Ammo, & PowerUps
LAMAXOUT ---- Max out all items
LARANDY ---- Weapon Super Charge
LAUNLOCK ---- Full inventory
LAREDLITE ---- Freeze Enemies
LAPOGO ---- Disable height checking
LACDS ---- Map Supermode
LASKIP ---- Force successful level completion
LADATA ---- Coordinate Information
LABUG ---- Insect Mode: Fit into small places
LAUNLOCK ---- Accessories

These codes only try if you are over 18 years old:

LADIDAOOHLALAFALALA LALALALA LAH ---- Mohc is naked in the cut scenes
LAISASLADOESYOUKNOWWHATIMTALKINGABOUT ---- won't tell you
LAQUICKBROWNFOXJUMPEDOVERTHELAZYDOG ---- measures your typing abilities
LASPAMSPAMSPAMSPAMSPAMSPAMSPAMSPAMSPAMSPAMSPAM ---- Carpal tunnel activation

The level codes:
LASECBASE ---- Secret Base
LATALAY ---- Talay:Tak Base
LASEWERS ---- Anoat City
LATESTBASE ---- Research Facility
LAGROMAS ---- Gromas Mines
LADTENTION ---- Detention Center
LARAMSHED ---- Ramsees Hed
LAROBOTICS ---- Robotic Facility
LANARSHADA ---- Nar Shaddaar
LAJABSHIP ---- Jabba's Ship
LAIMPCITY ---- Imperial City
LAFUELSTAT ---- Fuel Station
LAEXECUTOR ---- The Executor
LAARC ---- The Arc Hammer