The thing that makes Iron Lung's horror work so well is its refusal to let the player be anything more than a person in a space. Rather than control the submarine directly, via your controller or your mouse, you control it by pressing buttons in the world, and that distance makes it all feel rickety and fallible and keeps you feeling small. A short, exceedingly creepy little game that plays its simple premise (photographing alien things in an ocean of blood) as well as it possibly can.