Fight your way through 66 levels. Choose one of three goals in each level:
Defend yourself until the entire map is purified
Destroy all enemy portals
Find the key and escape
Kill all ten bosses on your way to meet the devil himself. Each boss has a more or less complex level. Find out how you can beat them.
Choose from 39 skills, organized into three main groups and three additional weapon groups to upgrade them.
Each difficulty has its own Steam leader board, see if you can break the high score and reach the top.