Hawkins' health status is revealed through visual cues; when injured the screen has a red glow and fades. Health restores automatically when keeping a low profile for a while. There are three difficulty levels to choose from (casual, normal and expert). On expert mode, enemy markers on the mini-map are removed, making it more difficult to keep track of opponents. While using the sniper rifle, Hawkins can hold his breath to steady the view and slightly slow down time. The different levels are split up in multiple sections with primary and secondary objectives such as rescuing hostages, locating officers, stealing supplies and placing explosives. The progress is largely linear with a small number of choices with a different outcome, but the size of the environment often allows for different approaches. Online multiplayer is supported for up to twelve players simultaneously.