Wolf 4: Attack of the Nazi Zombies is a mod for registered Wolfenstein, made by Jose Gutierrez.
A 10-level demo was released on January 2, 2006 featuring levels on Episode 1. All except the boss levels were made using the Creator tool.
New graphics are featured, including the chain gun replacement. In the demo version, this new sprite looked different to that in the final version.
Ammo has also been greatly increased.
The final 60-level version again featured the Creator maps on Episode 1, but all opening maps on remaining episodes were changed. Practically all other original Wolfenstein maps were kept in place, some being tweaked, sometimes to near-ridiculous proportions. E6L10, for example, features close to 300 actors, causing the mod to crash.