To maximize your Drebin Points (DP), focus on collecting every weapon dropped by enemies. Even if you don't plan to use them, selling them to Drebin provides a steady income. Prioritize purchasing the 'Patriot' weapon early, as it has infinite ammo and can be used to farm DP by repeatedly picking up and selling enemy weapons without worrying about your own ammo supply. Replaying acts on higher difficulties can also yield more DP. Efficient DP farming allows you to fully customize your arsenal and purchase expensive items like the Railgun.
