Play Metal Slug: 2nd Mission emulator game online in the highest quality available. Metal Slug: 2nd Mission is a Neo-Geo Pocket game that you can enjoy on Play Emulator. This NGP game is the US English version that works in all modern web browsers without downloading. Metal Slug: 2nd Mission is part of the Arcade Games, Action Games, and Platform Games you can play here. PlayEmulator has many online retro games available including related games like Metal Slug, Metal Gear, and Metal Sonic Rebooted.