STAR WARS Jedi Knight: Jedi Academy

Unlike the previous game (Jedi Outcast), you cannot simply turn off cheats and then save the file before completing any mission. In this game, it remembers your cheats, even if you turn them off.

I would suggest doing this after you have completed the game. You can then load up any old save (preferably near the end of a mission to make it easier).

To access cheats, press the buttons in this order:

(D-pad up, D-pad down, click left stick, click right stick, click left stick)

Once you have the cheat menu open, turn on one of the cheats like "God Mode" and then exit to the game. Finish the mission with that cheat active, and the trophy will pop.