THE KING OF FIGHTERS AFK Launches Metal Slug 3 Collaboration Update

Iconic Metal Slug 3 characters join the AFK RPG in new in-game events and content

Published on Feb. 11, 2026

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Netmarble, a renowned developer and publisher of high-quality games, has launched a new collaboration update for its AFK RPG THE KING OF FIGHTERS AFK. The update introduces iconic characters from SNK's classic action game Metal Slug 3, including Eri Kasamoto, Marco Rossi, and Fio Germi as new Legendary fighters. Special events and dungeons are also available to celebrate the collaboration through March 10.

Why it matters

The collaboration between THE KING OF FIGHTERS AFK and the beloved Metal Slug franchise allows the game to tap into a wider audience of classic gaming fans, potentially driving new player acquisition and engagement. It also demonstrates Netmarble's commitment to expanding the content and appeal of THE KING OF FIGHTERS AFK through strategic partnerships with other iconic IPs.

The details

As part of the collaboration, players can acquire Eri Kasamoto and Marco Rossi through special Pick-Up Events from February 11 to March 10, while Fio Germi will join the roster on February 15. Special events and dungeons are also available, including the METAL SLUG 3 Collab Check-In, where players can earn rewards like the Legendary fighter Marco Rossi and the Legendary pet Pocket SV-001. The Event Dungeon: Final Mission & Air Defense allows players to team up with familiar bosses from THE KING OF FIGHTERS AFK to take down a KOF-style reimagining of Metal Slug 3's final boss Roots Mars, with ranking rewards and event currency for a special draw event. The Assault Mission event dungeon also offers opportunities to earn Fighter Tokens to summon collaboration fighters.

  • The METAL SLUG 3 Collaboration Event will run from February 17 to March 10, 2026.
  • The Pick-Up Events for Eri Kasamoto and Marco Rossi will be available from February 11 to March 10, 2026.
  • Fio Germi will join the roster on February 15, 2026.

The players

Netmarble

A renowned developer and publisher of high-quality games, including THE KING OF FIGHTERS AFK.

SNK

The company behind the iconic 'THE KING OF FIGHTERS' fighting game series, which THE KING OF FIGHTERS AFK is based on.

Eri Kasamoto

An iconic character from the Metal Slug 3 game, who is now available as a new Legendary fighter in THE KING OF FIGHTERS AFK.

Marco Rossi

Another iconic character from Metal Slug 3, who is also available as a new Legendary fighter in THE KING OF FIGHTERS AFK.

Fio Germi

The third iconic Metal Slug 3 character to join the roster of THE KING OF FIGHTERS AFK as a new Legendary fighter.

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What’s next

Alongside the collaboration update, THE KING OF FIGHTERS AFK is rolling out a new Challenge Dungeon called Count Down Operation, which offers a tactical experience where players can strategically build up to five decks with a total roster of up to 25 fighters to defeat bosses. The game is also launching a dedicated returning player event, offering 14 days of returning benefits and a Return Celebration Pass with chances to obtain Orochi, Orochi Iori, and Orochi Leona.

The takeaway

The collaboration between THE KING OF FIGHTERS AFK and the iconic Metal Slug 3 franchise demonstrates Netmarble's commitment to expanding the content and appeal of its AFK RPG through strategic partnerships with other beloved gaming IPs. This move is likely to attract new players and drive increased engagement among existing fans of both franchises.