"ARENA OF KHAZAN is Number 12 in a series of Solo Dungeons designed for play with the Tunnels & Trolls system of dungeon delving. If you have trouble getting enough friends together to play T&T, or you have only a little time to kill, the the Solo Dungeons are for you. You need only the rule for Tunnels & Trolls, a few six-sided dice*, paper and pencil, and this booklet
in Arena of Khazan, you'll probably also need a 20-sided die or a deck of cards."
This solo adventure is unlike the others in the same series in that rather than exploring and fighting your way through a dungeon, you are fighting a series of combats in the arena. On the whole each succeeding combat tends to be more difficult, but on the other hand you will gain experience (and thus possibly improve characteristics) and have the opportunity to win or buy better equipment, magic items etc.
You can duck out after three successful fights but the full challenge consists of ten, with the last one guaranteed to be against something pretty nasty such as a Balrog or Unicorn. If you are lucky it will be a Giant Spider, if you are unlucky, a Shoggoth which frankly is unbeatable unless you are a very high level wizard or cheat!