Slay The Nereis is a clone of the arcade smash, Centipede. I am not sure if Spectral sold this game on their own before they licensed it to Tandy (like they did with Color Meteroids/Microbes). This version featured pretty much everything that the arcade version did, adding a rippling water effect at the top of the screen (where the blue waterline is shown). The object is to shoot all of the monsters, and when you shoot the Nereis, it splits into two at the point you shot it. You can also destroy the other shapes in your way as well.
Title: Slay The Nereis
Author: ??? (Spectral Associates)
Publisher: Tandy Corporation
Released: 1982
Requires: Color Computer 1,2,3, 16K RAM, cartridge, joystick.