īack in the early 2000s, Humongous published a number of promo materials for the games. In 2014, the Spy Fox series was released on Steam, along with the entirety of the Humongous Entertainment game library. Nearly a decade after its initial release, the first installment of the Spy Fox trilogy was ported to the Nintendo Wii in 2008, but its availability was significantly limited by legal problems concerning the port's development. When running with ScummVM, these games can be played on different operating systems, including Windows, Mac and Linux.

The bonus ending is accessible only if the player clicks an option at the right moment. Each game has a bonus ending wherein the player can catch the villain. The game allows for second chances on puzzles and tasks, and it is impossible to fail the overall mission. The main protagonist of the games, Spy Fox, uses a variety of gadgets to complete his missions. Each path has its own challenges, which some players find more challenging than others. The Spy Fox games each contain several different game paths randomly determined when the player starts a new game. Spy Fox in: Hold the Mustard (September 21, 1999).Spy Fox in: Cheese Chase (March 31, 1998).Two arcade games also exist starring Spy Fox: Spy Fox in: Operation Ozone (March 30, 2001).Spy Fox in: Some Assembly Required (September 21, 1999).Spy Fox in: Dry Cereal (October 17, 1997).

There are three adventure games in the series: His cohorts include Monkey Penny (his secretarial assistant), Professor Quack (creator of the SPY Corps gadgets), the SPY Corps Chief, and the four-armed, four-sleeved 'tracking bug', Walter Wireless. Spy Fox (voiced by Bob Zenk in Dry Cereal and Cheese Chase and Mike Madeoy in the other three games) works for a spy agency called SPY Corps. Many of the game's names and plot elements are spoofs of the James Bond and Get Smart series.

There are also running gags in the games such as Professor Quack eating a certain blueprint which shows how a gadget works and Monkey Penny's karate belt, which appears on the packaging boxes but is not shown in actual gameplay (although the belt appears in the bonus ending from Operation Ozone and is sometimes shown in animations that play during credits). Spy Fox is a software gaming series from Humongous Entertainment starring a fictional anthropomorphic fox of the same name, intended for children 8 and up.

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