NGH-013 and NGH-015

NGH-013 and NGH-015 are the assigned production numbers for two unreleased Neo Geo titles which are still unknown, with said production numbers currently being the only evidence of the existence of these games. Despite the lack of information, a few safe assumptions can be made about them:


 * Due to having very early production numbers, these games were likely under development during 1990 and intended for release around 1990 and 1991;
 * Given that, these games would likely have been developed by either SNK or ADK, since the Neo Geo only started receiving third party support in late 1991, with Aicom and Sammy developing the also unreleased Dunk Star, while the first third party game released for the system was Legend of Success Joe in July 1991.

While what exactly these games were is still unknown, some theories exist as to what they could be:


 * It is possible these games are early versions of games that would end being released later. The unreleased Sun Shine (NGH-008) was retooled and became the also unreleased Block Paradise (NGH-012) and Fun Fun Bros (NGH-026). It is also known that Mutation Nation (NGH-014) was originally titled Dream Over while early in production, though in this case the early production number was kept.
 * These games could have been intended as sequels to some of SNK's pre-Neo Geo titles. Notably, only Baseball Stars and Alpha Mission received sequels on the Neo Geo during its early years, with the only other pre-Neo Geo game receiving a sequel for the system being Prehistoric Isle. Ikari Warriors and Athena/Psycho Soldier, SNK's biggest hits from before the Neo Geo, were notably absent, so its possible SNK intended to make sequels for them on the system.
 * It is also possible these two production numbers were just placeholders for games which never went past pre-production or even the early design phase.