GTA: Medieval Rampage
Four years ago a kingdom fell into the hands of an evil king. That king didn't even bother to let the people of the old kingdom live. He ordered the complete annihilation of that race, but, a boy manage to survive and now he is on a path of revenge. The idea here is to kill all the enemies in a level. You would need to eliminate then all by shooting at them. Some enemies drop some money and if you are lucky, you might get a new weapon from that encounter. You can use the money to buy new weapon from the marketplace.