Hyperdimension Neptunia (超次元ゲイム ネプテューヌ, Chōjigen Geimu Neputyūnu, lit. "Super Dimensional Game Neptune") is a 2010 role-playing video game developed by Idea Factory and published by Compile Heart (distributed by Sega) in Japan and NIS America in North America and Tecmo Koei in Europe exclusively for Sony's PlayStation 3. It is the first installment in the Hyperdimension Neptunia franchise, and is followed by Hyperdimension Neptunia Mk2.