All upgrades are free.
Go Greek and keep the approaching horde of heathens away from your temple!
Mouse = Aim & Shoot
Click and hold to build up the power meter, then release to bombard the incoming enemies! Kill all of the heathens before they destroy your temple, or it'll be game over. Purchase upgrades and abilities with the XP that you earn. Get bonus XP and points at the end of each level by achieving the bonus awards!