PUBLIC MARKS with tags effects & overkill

In the near future the world has collapsed. You have been hired as a mercenary to fight against the enemy. Be paid for everything you kill and destroy and buy new weapons or upgrade the current ones. 12 weapons (incl. AK-47, M4, SCAR, RPG) with upgradable Scopes, Stocks, Cartridges, Barrels and Frontmouths gives you over 100 combinations! Fight through 80 waves and 4 extra Hell waves in 4 locations.