From the back of the book:
Your code name is Orion, and only you can thwart a deadly game of double identity that threatens the leaders of the world!
The President of the United States is BRUTE's first target in their sinister bid for world domination. As the computer whiz on the ACT (Adventure Connection Team), you must use your micro to:
Program a super-advanced enemy robot to do your bidding
Break into an electronic security system that's been programmed to kill you
Play a reflex-challenging shooting game that will mean life or death to hundreds of people
Dead Ringer is more than a great adventure story. It's danger, action, and suspense - plus computer programs for you to run.
This program will run in BASIC on the IBM PC, PC jr, APPLE II+, //e, COMMODORE 64, VIC-20, ATARI 400/800, RADIO SHACK COLOR COMPUTER, and RADIO SHACK TRS-80.
Includes a reference manual with user tips and explanations of the programs!