Kar'kh war is kind of a beat them all.

You control a crusader on a small planet, fighting a religious war against the deamon Kar'kh.

After 5 min he will duel you; so you have 5 minutes to gain levels, get stronger, controls the church and the cimetery gaining bonuses and finally defeat the devil.

Focus and keeping on a safe place, taking a building very quickly and killing everyone with first weapon.