Space Channel 5 is a music video game developed by Sega AM9 and published by Sega. Originally released for the Dreamcast, it was later ported to the PlayStation 2. A version for the Game Boy Advance (GBA) was published in 2003 as a Western exclusive. Following space-faring reporter Ulala as she investigates an alien invasion, players engage in rhythm-based combat where Ulala mimics the actions of rivals in time to musical tracks.

United Game Artists (UGA) was a subsidiary of Sega headquartered in Shibuya, Tokyo, Japan. It was founded by Tetsuya Mizuguchi, a video game developer who had experience with Sega's AM3 division. After separating with Kenji Sasaki to form AM Annex, Mizuguchi left Sasaki's team to form another division. This studio would later be known as Sega Consumer Development 4 (CS4) and Research and Development #9 while a department of Sega, before becoming UGA as a wholly owned subsidiary of Sega.