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Analysis of Card Collection Game ‘Hearthstone’*

Hearthstone is an attractive and tactical card collection game and has millions of monthly active users (MAU) all over the world. In this research, the entertainment assessment of Hearthstone is measured by using the game refinement (GR) theory. Previous studies have reported that GR measure is a reliable tool to measure sophistication of board games, sports games, and video games. However, most were conducted on the entirety of the game. As different roles and different strategies have different game processes, the specific assessments of an individual game process should be studied. The GR measure of each role and strategy were different. Each role (n = 9) simulates a fight (n = 1000) with another (n = 9) using different strategies (random, attack, control, and fatigue). Assessing through the GR value, the Mage (role) is observed to be appropriate for a novice player. Also, according to the GR measure of game sophistication, the attack, fatigue, and control strategy were found to be difficult, interesting, and mediocre to the player experience, respectively. Additionally, previous versions of Hearthstone was also analyzed in which several random elements have been added since 2015 which increases the GR value. Thus, it can be concluded that the increase in random elements can increase the Hearthstone attractiveness and popularity.