The game's mechanics are based on the "Dungeons & Dragons" 3rd edition rule set; the outcome of most actions, such as combat and skills usage, are randomly determined by dice rolls. For example, when a fighter attacks, the computer would digitally "roll" a 20-sided die (called a d20 in-game) to determine if he hits the target. On a success, another die is rolled to determine the damage dealt, with powerful weapons assigned to dice with a greater number of sides, due to their ability to do more damage. Although the outcome of nearly all actions is determined by dice rolls, the player does not see them, with the results calculated in the background. However, the player has the option to display the outcomes of these rolls. The player can control the game almost entirely via the mouse.