Forbidden Psalm is a tabletop skirmish game set in the world of the Mork Bork role playing game. Playable solo, co-operatively or competively, players start by creating their warband of five adventurers, using random tables to add in flaws and features. Weapons and armour are purchased.
The book contains ten scenarios which can be linked together to form a campaign. The game is played out over a 2' by 2' area, using inches to measure movement. Each scenario has a variety of goals to be achieved as enemies are spawned and attack.
Once the scenario has ended -- either due to successfully completing it and escaping, or time running out (it works on a system of rounds), or the warband being wiped out -- experience is determined, treasure and items can be sold for gold, and characters can spend XP to improve their abilities.
The game also includes instructions on how to generate scenarios, as well as a bonus cart-racing game.