Gamehelpraubbau
A game consists of 3 matches. Winner of a match is the one who leaves the mine with the most gems. A match consists of several rounds. Each round consists of a planning and an action phase.
Planning phase: There are several options: Dig, blast (nitratine and sulphur needed), scare another player (spider needed) or leave the mine. "Pass" means, that you don't change your previously announced plan. As soon as every player has passed in a row, the planning phase ends. If one player changes his plan, all other players are allowed to react. Players who leave the mine save their lives but are inactive until the end of the match. As soon as one player leaves the mine, there are maximally two more action phases before the match ends. If you want to go onto a field where you know the content of the treasure, you need a drift set.
Action phase: Collect your treasure, place a tunnel card, distribute new treasures, choose a spot for the next round.
Scoring: If the treasure you are collecting is a dragon, you have lost the match (-2 points).
Everyone else in the mine dies (-1 point), only the ones who have left the mine survive.
The survivor with the most opals wins (+3/+4 points).
A draw will award you +1 point.
All survivors keep their materials for the next match (except the opals), everyone else loses everything.
A match ends as well, if there are no tunnel cards left or if everyone has left the mine.
In each treasure set (red, green, violet) there are 2 dragons and 1 collapse.
If there are two or more players with the same number of points after the 3rd match, there is a tie-break. Players have to pick up one treasure card at a time. If you pick a dragon, you have lost - last one standing wins.