Nazca (ナスカ), was one of the third-party developers for the Neo-Geo console. It was composed of former Irem empoyees, who were unsatisfied with the company inactivity at that time. Their first game for the Neo-Geo was Neo Turf Masters, but it was with Metal Slug: Super Vehicle-001 that they became known. After the first title, SNK bought the rights of Metal Slug, and hired the Nazca staff to continue the series in SNK.
The first Metal Slug title retained elements from some of their later works on Irem, most notably Gunforce 2 and In the Hunt.