Players would record their 1CC runs on VHS or early digital cameras, submitting them for verification. The first major "esports" style events were held at classic gaming conventions like the and Japan’s Game Party . These tournaments used a simple, brutal format: two players, one credit, highest score wins. Prizes were rare cartridges or arcade sticks.
The rise of streaming platforms, particularly (launched 2011), fundamentally changed Metal Slug competition. The focus shifted from high-score chasing to any% speedrunning . The discovery of glitches—such as the "Slug Flyer skip" in Metal Slug 3 or the "zombie glitch" for infinite bombs—created a technical arms race.
The competitive roots of Metal Slug began exactly where esports itself started: the arcade. The original Metal Slug (1996) and its masterpiece sequel Metal Slug X (1999) were designed for coin-drain difficulty. The competition was immediate and local:
Metal Slug never had a million-dollar final. It never sold out an arena. But its competitive history is pure: arcade warriors turning a quarter into a 45-minute masterclass of reflexes and routing. In the esports timeline, Metal Slug is the underground legend—the game that proved cooperative survival could be just as intense as any head-to-head battle. And for those who can 1CC Metal Slug 3 on max difficulty? They need no trophy. The initials on the cabinet are enough.