Paul_Koning at
dell.com wrote about Tennis For Two:
Neat. That predates the PDP-1 "spacewar"
game, which I had thought of as the oldest. And it may still be the oldest video game on
a digital computer.
There was no digital computer involved in Tennis For Two. It was
effectively an analog computer
custom designed for the game.
OXO on the EDSAC may be the earliest known video game on a digital computer.
Eric