First thing we've got going on is a new system implemented into Infiltration. Basically it's a visual breathing application that is directly proportional to your stamina level. It works with all weapons, but most noticeably are the sniper rifles. The breathing is setup to allow you to control it when necessary by holding down the Alt-Fire button, so you can take a more precise shot. It works beautifully, and subtly adds to the skill of each weapon.