Like Shono's earlier titles, Gadget uses pre-rendered 3D computer graphics and resembles a point-and-click adventure game similar to Myst (1993), but with a strictly linear storyline culminating in a fixed finale.

After collecting his belongings in a suitcase, the protagonist takes an elevator ride to the lobby, during which a boy replaces the case with another identical one containing various spy-related paraphernalia.

[4] A special edition of the game, Gadget: Past as Future, was later released on four CDs in 1997 by Cryo Interactive for Windows, Macintosh, and the PlayStation home console.

[6] In 1996, Billboard described the game as a sleeper success and noted that it had attracted a cult following in America, leading to the re-release of earlier Shono titles Alice: An Interactive Museum and L-Zone.

[7] According to Mexican filmmaker Guillermo del Toro (director of Hellboy and Pan's Labyrinth), Gadget was influential on films like Dark City and The Matrix.