The Gregory Rift in the Great Rift Valley is named in his honour.- Centipede (video game) (Wikipedia)
Centipede is a 1981 fixed shooter arcade video game developed and published by Atari, Inc. Designed by Dona Bailey and Ed Logg, it was one of the most commercially successful games from the golden age of arcade video games and one of the first with a significant female player base. The primary objective is to shoot all the segments of a centipede that winds down the playing field. An arcade sequel, Millipede, followed in 1982.