Space Wars is that age old classic of Space Invaders.
The game pretty much plays as the original did with the main
differences being that you have no bunkers to hide behind, the
aliens shoot homing missles and the motherships have a rather
deadly laser.
The program is supplied in SSD (single-sided disk) format, so
that it can be easily imported into your favourite BBC Model B
emulator (other Acorn emulators may also work, but are
untested).
NOTE: Once you've loaded the disk into your emulator, please
type CHAIN "SP.WARS" at the ">" prompt to run the program, as it
is a multi-part loader and will not work properly otherwise.