Wolf Island is a mod for registered Wolfenstein, made by Fraggeur. It was released on December 10, 2013 via ModDB.
The mod features 30 levels and a number of changed graphics and sounds. Levels are played in an episodic flow. As the title indicates, a nautical theme features in the mod, though it is in many respects also a classic-themed mod.
Among some of the more curious features are BJ Blazkowicz brandishing an officer's hat and a sea turtle featured on a brown marble texture.
The project was underway for a number of years, before the advent of SDL. As such, it was only ever made in DOS.