The world would indeed have been a different place had the Roaring Twenties not delivered the wonders promised by visionaries. Instead, war walkers now stride across the battlefield of Europe, huge supertanks thunder over North Africa, rocket fighters duel high above the Pacific, adventurers and superspies battle the Nazi forces in the shadows and scientists work feverishly in their laboratories to perfect the next doomsday weapon for their masters. Powered by advanced science, will the darkness of fascism spread across the world, or can brave men and women prevent it?
Gear Krieg was a "hybrid" game system that supported roleplaying, miniatures wargaming, or a combination of both. Several optional rules mechanics were incorporated to enhance character survival in the roleplaying variant.
The first edition of the game was based on a custom rules system. The (q.v.) second edition of the game split the setting from the rules, allowing the setting to be used with different game systems.