The name Turrican is based on "Turricano", an Italian name which Manfred Trenz, the inventor of Turrican, found in a phone book.
The Box to activate the elevator in Turrican was simply part of the copy-protection. If you had a copy, it just was not there, as well as some other Bonus rooms.
The Turrican Package and Poster were drawn by Celal Kandemiroglu.
The game was only 1200 screens large.
Manfred Trenz first planned that Turrican should have 20 Levels.