Day of the Viper is a first-person shooter video game published by Accolade in 1989.

As the Viper robot, the player must explore five abandoned hi-tech and heavily guarded buildings in order to find and install floppy disks.

[1][2] The game was reviewed in 1990 in Dragon #157 by Hartley, Patricia, and Kirk Lesser in "The Role of Computers" column.

[3] Zzap!64 noted Day of the Viper as "an incredibly similar game" to Slaygon (1988), which is made by the same developers.

Further commenting that "Charging £19.95 for a game that's two years old (and doesn't seem to have been updated) is a bit suspect.