Incursion

Incursion is a tower defense game in which you have to protect your lands
from the undead and demon hordes that invade them. On the map are a number of
shacks in which you can recruit a footman, archer and sorcerer. You earn money
from the enemies you kill used to upgrade your units. Enemies sometimes drop
spells that can be used. If you complete maps you earn skill points to buy
upgrades. Examples are bigger range, cheaper units and better armor. A list of
awards can be claimed that will earn you more skill points.