Luffaren is a level designer, notable player and very popular amongst the Zombie Escape community. His most famous works are by far ze_Predator_Ultimate, ze_Frostdrake and ze_Santassination. Overall, Luffaren has established a reputation for being one of the most influential figures in Zombie Escape, both for his commitment in level design as well as his dedicated playstyle.
After his work on Predator, Luffaren worked a number of years on a secret project, leaving almost no hints or revealing images about its concept and design for a long time (A number of other works have been released during this development time, including Frostdrake and Santassination). This project is now know as ze_Castlevania and released for Counter-Strike: Global Offensive.