Altaria is an island drifting in space that can be accessed through portals from different dimensions. Three enormous altars situated on the island give power over all dimensions to those who take control of them.

In Altaria: Clash of Dimensions, each player uses three of ten characters to try to capture all of the altars placed in the center of the game board or the portal that belongs to her opponent. The game consists of seven rounds, and each round is divided into three stages. In each stage, a player gets action points (APs) that are used for the skills of one character. With the help of these APs a player can relocate the character, attack the enemy, or place a unique token of power on the board. Each token can change the course of events in the game.

The modular board has removable components that provide players with a number of starting combinations and make it possible to play a unique game from the very start.

An interesting feature used in Altaria is the passing of the tokens of power. After a few stages of the game, they disappear from the board which makes the game more dynamic and constantly changes the situation on the board. Try to make the most of the skills of your characters, outwit your opponent, and be a better tactician.