The debug mode for Jak 2 (and every other game in the trilogy) has a hidden debug mode. It can be activated using sequential button presses.
The first code is (while holding down L3) UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE. (You will hear a sound afterwards indication that you did the proper combination) The second code is the same as the first, but in a reversed order. However, I haven't been able to get it to work. (The first code...
Jak 2 - Trouble accessing debug mode
The first code is (while holding down L3) UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE. (You will hear a sound afterwards indication that you did the proper combination) The second code is the same as the first, but in a reversed order. However, I haven't been able to get it to work. (The first code...
Jak 2 - Trouble accessing debug mode