@ Natural Ultimate Digital Experiment is a life simulation video game released exclusively for the Xbox in Japan.

In this simulation-style game, the player assumes the role of tester for a new product: a female humanoid robot called P.A.S.S.

[1] The game incorporates the Xbox's internal clock to track time, which influences gameplay in various ways.

[2] Its concept is similar to the Sega Dreamcast game Seaman, where the player interacts with an avatar via voice.

@ Natural Ultimate Digital Experiment was announced on 19 September, 2002, and a promotional video was showcased at the 2002 Tokyo Game Show.