Zone of the Enders, also known as Z.O.E., is a video game that was developed and published by Konami in 2001 for the PlayStation 2. It was produced by, and is closely associated with Hideo Kojima. The game is based around mecha combat. The mechas were designed by Yoji Shinkawa, the character and mechanical designer for the Metal Gear Solid series. The game was originally sold packaged with a preview demo of the then-upcoming Metal Gear Solid 2: Sons of Liberty.