In Breach, players must battle creatures of a parallel alternate mythological Earth that is invading modern Earth. Players pick a class to take on the Veil Demon, an antagonist that is controlled by another player. The Veil Demon can control the enemies and summon boss creatures. You can check out the trailer which details some of the available classes like Gunslinger and the Chronomancer.
Breach will enter Early Access later this year with plans to enter a full, free-to-play launch in 2019. You can sign up to participate in the alpha by heading here.