Released on; Sinclair Spectrum, Commodore VIC-20, C64, Amiga and PC between 1983 and 1987.
Text taken from this page on the Llamasoft web site:
Possibly the most stupidly-named game of all time. Actually not a baa-d little shooter with an innovative control method which allowed the player to deflect shots in flight by manipulating a force field.
Sinclair Spectrum Download
VIC-20 Download
C64 Download
Amiga Download
PC Download