Of course, there are all kinds of enemies to defeat in these landscapes. They'll hide in buildings, or snipe down at you from rooftops. There are gun emplacements that pop out of the ground to surprise you. In addition to enemies, there are keys to collect, switches to throw, medkits to find, and so on. Your soldiers must be aware of both their energy and health levels.
Batteries recharge a cyborg suit's energy levels, and medkits restore health.