This action game is what you have been looking for. The setting is in future when almost all the humans will have been destroyed by a nasty nuclear explosion. Only one group of people is left alive and you are in it. Be the one who saves the group and with it, the one who saves the whole mankind. For this purpose, be sure to use all of the different kinds of weapons available to you. And be prepared for the plot that cannot be predicted easily. And if you need to use game mod, you will get either ammo or full health.
Z.O.N.A Project X – Ammo/Health Mod
Z.O.N.A Project X screenshots: