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.
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. metal slug esports game series history
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: Players would record their 1CC runs on VHS
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. Prizes were rare cartridges or arcade sticks
SNK’s revival in the mid-2010s brought official support. The release of Metal Slug XX on Steam (2016) and Metal Slug 7 on modern consoles added online leaderboards with replay sharing. But the real milestone was starting in 2018. For the first time, Metal Slug (typically Metal Slug 3 or Metal Slug X ) was included alongside King of Fighters and Samurai Shodown as an official tournament title.
Today, Metal Slug esports exists in a hybrid space. The annual side tournament often features Metal Slug , but never as a main stage title. The primary competitive hub is the Metal Slug Scoring League (MSSL) , a community-run organization that maintains world record tables for every mainline entry.
Arcade cabinets tracked high scores with initials, creating a global, asynchronous leaderboard. The true mark of a master was the "1CC" (one-credit clear). Unlike versus fighters, Metal Slug was a cooperative battle against the game’s ruthless AI—requiring pixel-perfect movement, weapon management, and knowledge of hidden score items. The esports "event" was the Saturday night arcade crowd, where players dueled for the top spot on the machine.