Health system
The health system in RWR is not the usual one most might be used to from many other shooters as you don't "take damage" in the traditional sense. In fact, every bullet can kill at any moment. You don't have a health bar or any other indication that you've been hit for that matter (until you're dead, that is). Every weapon has a different kill probability which is around 50% for assault rifles but can be up to 100% for some precise weapons like sniper rifles, e.g. if those hit you, you are dead.
However, there is an armor type item in-game that comes a bit closer to a health-point system - a vest (to be more specific, the Vest Type II is used in this example).
It gives you the ability to survive 3 lethal shots, each shot bringing its own consequences and damaging the vest. These vests can be bought at the Armory. Vests can also be worn by some AI soldiers - Vest Type II (hey, give them some fun too!) and by Elite soldiers (Officers) - Vest Type III. Vest Type III can be obtained by knifing enemy Elite soldiers (Officers) and the stabbed enemy will drop a vest down to 60% or can be found in a secret crates(unscathed). A vest icon is shown to the right of the grenade slot.
In the table below those 3 stages of the vest status are listed below: