Hacker is a 1985 computer game by Activision. It was designed by Steve Cartwright, produced by Brad Fregger and was released for the Amiga, Amstrad CPC, Apple II, Atari XL/XE, Atari ST, Commodore 64, Macintosh, MS-DOS, MSX and ZX Spectrum. The game was released two years after the release of the film WarGames, when computer hacking and computer security were in the limelight.