DJ Max Portable Black Square (Korean: ë””ì œì´ë§¥ìŠ¤ 포터블 블랙 스퀘어, DMP BS) is a music game for the PlayStation Portable developed by South Korean developer Pentavision released on December 24, 2008. This is the third major game of the DJMAX series released for the PSP. The game includes various enhancements and new features built on from DJ Max Portable 2 and DJ Max Portable Clazziquai Edition. The original aim was to launch the game in November, however due to numerous bugs found in DJ Max Portable Clazziquai Edition, the release of DJ Max Portable Black Square was postponed. Source: Wikipedia, "DJ Max Portable Black Square," available under the CC-BY-SA License.