Beyond weapons and health, you'll encounter various key items and interactive environmental objects. Keycards are often required to unlock doors or access restricted areas; they are usually found on defeated enemies or near control panels. Computer Terminals can be interacted with to open doors, disable security systems, or gather intel. Look for glowing interactable objects. Explosive Barrels and other volatile containers can be shot to create damaging explosions, useful for clearing groups of enemies or destroying obstacles. Vending Machines sometimes offer health or stamina boosts for a small 'cost' (usually just an interaction). Always be observant of your surroundings for these crucial elements.
