Hellraid, the game which attempts to mix the combat of Dead Island with the setting of Dark Messiah (or Heretic, or Hexen), has a prequel that you can play right now. The catch? It's an interactive movie. Don't worry though, it's lotsa fun.
Techland released the choose-your-own-adventure series on YouTube as a lead-up to the game's events. In it, you help Brother Edyn, a monk, escape from a zombie-filled monastery. Easy, right? Well, apart from zombies, there's also traps, convenient ambush spots, and collectable items (like health potions) to consider.