It may seem like a pretty basic aspect of gaming — knowing the controller. Or, as is the case with the Sony PSP, knowing the system. If you're not too familiar with gaming systems though, this little guide should help you understand how to enter codes on your PSP.
As you read through the cheat codes that are available in the PSP Cheat Codes section you'll notice that a lot of the codes are abbreviated. Knowing exactly what they stand for is key to making your cheat code entry go as smooth as possible.
Several areas of the image above are marked with yellow areas, below I've detailed a brief description as well as any important notes regarding them.
L1 / R1 - These are the triggers, or bumpers at the top left and right of the system. Whenever you see a code with R, R1, L, or L1, it refers to these triggers.
D-Pad - Here is where most of the confusion comes in. Any code that uses directionals (like Up, Down, Left, Right) is entered using the D-Pad unless otherwise noted.
Analog Stick - In some games it is required that directional input are entered using the Analog Stick, however, this is rare and will be clearly noted on the cheat page.
Start / Select - Many times the Start button is used to pause a game prior to entering a cheat code, and the Select button is sometimes used in codes.
X, O, Square, and Triangle - These are generally the bulk of the cheat codes, simply press them in the combination required to activate a code.
Now that you're familiar with the proper buttons to press, go grab some PSP cheats for your favorite games.