Remember that bit in Tron when they started throwing those Frisbee-style affairs about? That's what you have to do in Disc. Two players can play, standing on either side of a chasm. Behind each player is a wall made up of eight tiles, each with a symbol on it. One player throws the disc at the other, who must either catch it or dodge it. Catch it and you can throw it back. Dodge it and it hits one of the tiles behind you. The symbol on the tile determines how many times it can be hit before the corresponding floor tile in front of it disappears - in the case of a circle, this is only once.

Thus, you have three ways to beat your opponent: hit him with the disc until his shield expires, trap him on one square by eliminating the others or try to make him fall off into the chasm. Everything happens so fast, you need plenty of practice - but one you get into it, Disc is very enjoyable. Graphics are well animated, particularly the characters, and there are some effective samples screams when someone dies. The sampled music in the intro sequence is the best I've ever heard in any ST game. A sure bet for many hours of glued-to-the-screen gameplay.