A.D. Publishing have released the Gear Krieg: German Walker Compendium II: Walkuere expansion for the World at War: Gear Krieg rules.
From their announcement:
The German Walker Compendium II: Walküre your comprehensive guide to using the German Walküre superscience walker in Battlefield Evolution World at War: Gear Krieg.
The German Walker Compendium II: Walküre takes a detailed look at the many types of this superscience walker for your German forces from all theatres and periods of World War II! Each vehicle is detailed with background information, factory variants, field modifications and a modelling guide.
Included are 14 Walküre variants; Ausführung A to H, the “Flak-Walküre” and “Sturmwalküre”, Ausführung E-2 to E-X and even the rare Alpenkämpfer and the Panzerbefehlskämpfer II; the book also provides new Traits, an AFV force list and an extended German armoury to add to your games of World at War: Gear Krieg.
All units in this book are designed by the same principles as the existing vehicles in the Battlefield Evolution: World at War rulebook and Battlefield Evolution: Pacific War Supplement also written by Agis Neugebauer.
This book requires the use of Battlefield Evolution: World at War, available from Mongoose Publishing. You can download the book via the Wargames Vault.