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Dongleware Verlags GmbH was a German game studio/publisher founded in 1991 by Meinolf Schneider, active through the 1990s before shifting away from entertainment software in the early 2000s. Their best-known DOS releases revolve around the ingenious marble-and-labyrinth puzzle game Oxyd and its follow-ups, alongside distinctive titles like Tubular Worlds and Bolo. If you want to revisit these retro PC favorites today, you can play them on that page online for free—no fuss, just pure classic game design.

Tubular Worlds is a classic DOS side-scrolling shooter published by Dongleware Verlags GmbH, built around the simple thrill of flying fast and reacting faster. You play through surreal, tube-like combat zones that feel like a...