If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You play as the evil Soul Tyrant, who has arisen from the fires of the under world, with only one purpose. Destroy the world! Decapitate your way through the hundreds of soldiers while capturing altars. Kill, and use the bodies of the dead as your minions! Collect souls from your kills and use them to summon very powerful creatures from the depths of the underworld! Your souls can also be used for devastating special attacks!
W,A,S,D to move around. Mouse to look around. P for Menu/Pause. Left click for primary attack, right click for secondary. 'F' to open up Summoning menu, 'E' to open unit ordering menu.