Mission: Mainframe is a 1987 text-based sci-fi role-playing game for MS-DOS, created by Jerry Plemons and Brian Shankman. Set inside a rogue computer system, the game casts players as a team of digital operatives navigating a virtual environment filled with hostile programs. With its turn-based combat, party management, and command-line interface, it delivers a strategic and imaginative experience reminiscent of early mainframe-era RPGs.