1994 saw the release of Shoot 'Em Up game called Onslaught on the Amiga systems, created and published by Carl Moss for free as a Public Domain.
The title Onslaught is chosen well. It's a constant onslaught of enemy formations you have to dodge and destroy. You get no single moment in which you can relax. After 10 and 20 levels, a huge boss enemy appears, filling the screen with even more bullets. A short, fast, exciting, and hard-as-nails space shooter.