Tunnels and Trolls is a role-playing game from the 1970s.
Published by Flying Buffalo, it was developed to be an alternative to Dungeons and Dragons which was aimed particularly at solitaire and play-by-mail gameplay. In the early 1980s a computer version (Crusaders of Khazan) was put out which embodied many of the favorite old solo modules, but which (in a fore-shadowing of modern computer RPG production) was buggy and somewhat difficult to play.
It is a simple game that is rich in detail, easy to play and with a sense of humour.
The only polyhedral dice you need to play T&T are six-sided dice, however you can need quite a lot of them. The phrase buckets of dice has often been used to describe how many a high-level[?] campaign requires.
