Manfred Trenz is a German video game developer, programmer, and composer. He created the Turrican series, which is still remembered to this day. Trenz currently runs his own development company, Denaris Entertainment Software.
While Manfred does not normally compose music for games, he developed all of Super Turrican for the NES and also wrote the sound effects for Turrican II and Enforcer.
Manfred used David Whittaker's sound engine and then modified it. The music was written in 6502 assembly.
Turrican II development team, Manfred third from the right. The One #28, January 1991.