The Gratuitous Tank Battles Website now offers Gratuitous Tank Battles: The Western Front, a World War II-themed expansion for Positech's tower-defense game. This is being offered directly for now, and will be added to Steam soon. Here's word:

The original title was set in an alternate universe where world war one continues into the laser age, and GTB:The Western Front focuses on the world war 2 era of the story, pitting American armies against German in the heart of Europe.

Eight new missions are included woven into a completely new single-player campaign. A total of 16 new tank 'hulls' including the Tiger, Sherman and Pershing are available in the expansion, and can be used in the basic game as well, along with all new props and textures from the new campaign for use in the built-in map editor. The first four maps allow WW2 technology only, whereas the later maps allow players to strap laser cannons to Tiger Tanks, which is one of the developers chief ambitions in life.