Complex sentence: The Predator can use elevators to travel between levels but he cannot travel through the air ducts, carry medical kits and use them for later to recover health, and use a cloaking device to become invisible from the Aliens and the Marines.
Split into simpler sentences: The Predator can use elevators to travel between levels but he cannot travel through the air ducts. He can carry medical kits and use them for later to recover health, and use a cloaking device to become invisible from the Aliens and the Marines.