In Mithril, each player plays a team of dwarves exploring a mine to discover buried valuables, such as gold, beer, mithril and a treasure chest. Players must dig carefully to avoid being crushed in a cave-in, as the mines' stability is unpredictable, and the other players can sometimes trigger cave-ins and other hazards.

The game ends when a players brings the treasure chest back to his entrance. Then, the richest player wins the game.

The game is still under development.