Yeah, health packs in other games that immediately heal you are more realistic, or medics that come give you an injection that immediately put you on your feet are more realistic Halo's shield system is far more realistic than most FPS games..in terms of health besides the game is science damn fiction for crying out loud. Seriously you are a cybernetically enhanced futuristic soldier in a galactic battle against several alien species...Realistic, ROFLMAO!! if you are actually complaining about it not being "realistic" you're a fucking moron. Period.