To activate this cheat, head to reg_config.txt in your game's installation folder and find the line that says cheat_mode = 0. Change the 0 to a 1 and save. Keep in mind that you're doing this at your own risk, because this could potentially mess your files, game, or computer up.

Then, when on the inventory screen, hold down the CTRL button and press X. Doing so will score you 1,000 Denars. Do it over and over again for as many Denars as you want.