Was it maybe called Surround? Try looking up Atari catalog # CX2641 and see if it brings back any more memories :)

Hmm I had an ST. I think I vaguely remember this. Was it a PD game or commercial?

Only thing I can remember is a blue 3½ floppy with "trek4" handwritten on it so it must have been "found" by my relative that owned the st at the time.