Thorgal: The Board Game, while having a strong narrative element, offers a brand new, unique action selection mechanism. In this new mechanism, actions have varying power depending on which other actions have already been taken. Players carefully plan their strategy and sequence of actions taken, as this directly impacts the strength of the effect of each action. This creates an interesting decision space and makes each turn important for everyone at the table.

The game consists of 7 stand-alone scenarios, each taking roughly 90-120 minutes of play. Scenarios do not form a campaign nor have any legacy features, so they can be played by different playgroups and over an extended period of time.

Another important mechanic involves Character development. Each character gains experience during the game and advances their abilities. This dynamic progress allows players to make meaningful decisions about how to develop their hero in the game. Characters gather resources and craft objects to help them survive in the dangerous world.