on how MMORPG reverse engineering works, or are you looking for similar games currently available?
claim to still possess the original local client files for both Ghost X and Ghost X Ultimate. They are actively looking for developers with the technical expertise to reverse-engineer these into a private server. Why Ghost X Ultimate is Missed Ghost X Ultimate Private Server
"Ghost X Ultimate Private Server" represents a preservation effort for a defunct MMORPG, sustained by a dedicated community. While it offers the only way to experience the unique Nanobot transformation gameplay today, it is technically unstable and legally precarious. Users are advised to use unique passwords and understand the impermanence of their progress. on how MMORPG reverse engineering works, or are