It tries to break the linear FPS mold by offering "sandbox" style levels that let you choose between stealth or all-out combat .
You use binoculars to tag enemies and can take advantage of the environment for sabotage and sniped kills. Enemy Front
It’s a relatively short ride, taking about 5.5 hours for the main story, though completionists might spend up to 12 hours finding everything. It tries to break the linear FPS mold
Check out these gameplay walkthroughs and reviews to see the combat and mission design in action: Enemy Front