1001 Video GamesThe Arcade version of Operation Wolf appears in the book 1001 Video Games You Must Play Before You Die by General Editor Tony Mott.
BPjS/BPjM indexOn April 29, 1989, Operation Wolf was put on the infamous German index by the BPjS. For more information about what this means and to see a list of games sharing the same fate, take a look here: BPjS/BPjM indexed games.
Operation Wolf 3In 1994, the developers published an Operation Wolf 3 slot machine. The gameplay was exactly the same as in the first part, but had a special mission at end of each level.
SoundIf the Tandy/PCjr or CMS/GameBlaster sound modes are being used, then in game sound effects are played through the internal speaker and music is played through the sound hardware. In Adlib mode both music and sound effects are played through the sound board.
Information also contributed by Servo and Xoleras