Always observe enemy patrol patterns before engaging. Use the Solid Eye frequently to tag enemies and identify useful items. Don't be afraid to use non-lethal options; they often yield better results for your end-of-mission ranking. Conserve ammo, especially for specialized weapons. Utilize the environment for cover and to break line of sight. If you're spotted, try to break contact and hide until the alert status drops. Experiment with different approaches to each situation; there's rarely only one solution. Remember to save frequently!
