News: The collection is complete.
SNK Playmore has announced the upcoming Metal Slug Anthology for the Wii and PSP will now include Metal Slug 6.
Metal Slug 6 was released in arcades earlier this year and it added two new characters to the team: Ralf Jones and Clark Steel of the Ikari Warriors. According to SNK, the story features the squad teaming up with the Rebel-Martian alliance to "defeat an even greater threat."
Metal Slug Anthology is still on track for a November release.