Catacombs is an action/dexterity-based adventure board game. One player controls the Overseer, controlling the monsters of the catacombs; the other player(s) control the four heroes who cooperatively try to defeat the monsters and eventually the Catacomb Lord. Each of the heroes has special abilities that must also be used effectively if they are to prevail.
The main mechanism of Catacombs is for the players to flick wooden discs representing the monsters and the heroes. Contact with an opposing piece inflicts damage, but missiles, spells, and other special abilities can cause other effects. When all of the monsters of a room have been cleared, the heroes can move further into the catacomb. Items and equipment upgrades can be purchased from the Merchant with gold taken from fallen monsters. The Catacomb Lord is the final danger that the heroes must defeat to win the game; conversely, the Overseer wins if all of the heroes are defeated. The game is designed for quick set-up and fast play within 30 to 60 minutes.
The rules for Catacombs are fine if you want to sit and casually read the 24-page rulebook, then remember it all later when you're ready to play, but they're not so good as a reference while playing. Here is a 1-page (2 with setup) summary you can use as a reference while playing.
Here is the [url=https://docs.google.com/document/d/1Wm7MQv8xUQ-OYCYY17BGp8e8MY2o7EZrO-Mq_E3SmFQ/edit?usp=sharing]Google Doc[/url]; if you see anything wrong or missing, you can add a comment to that document.
1.1 Corrected chain shot per feedback from Ian McCarthy. Added Other Special Icons section for non-shot icons. Added Combo. Noted that Devour also ends if room is complete, which could mean that the devourer is alive, but frozen.