Oxyd is a challenge in exploration and dis- covery that introduces the player to inter- esting puzzles, elaborate mazes, friction, velocity, gravity, electricity, magnetism, lasers, prisms and many other aspects of the physical world. Using the mouse, a marble is guided through the Oxyd landscapes. You may even play Oxyd by modem and enjoy a collab- orative thinking experience with a friend. VGA and EGA versions 3.B for the PC.