Olympic Decathlon is a sports video game written by Timothy W. Smith for the TRS-80 and published in 1980 by Microsoft.

[4] BYTE in 1981 called Decathlon "a great party game"[5] and "a remarkable simulation ... challenging and entertaining", praising the adherence to the real decathlon's rules and the TRS-80 and Apple II versions' graphics.

[6] Former decathlete Douglas Cobb wrote in PC Magazine in 1983 that "this impressive, realistic game brings back vivid memories and provides exciting entertainment through all ten events.

The jumping and throwing events are particularly authentic, applying theories used in actual competition.

Strategies combining speed, timing, and direction are authentic enough to help an Olympic hopeful train on the basic principles behind the individual events".