A number of video games involve moral narratives or require the players to make moral decisions. Research from psychologists has helped to understand the effects that video game content can have on how individuals think, feel, and behave. Recent research has examined the role of morality in video games, yet there are many inconsistencies in the findings that could be due to the use of commercial video games for research purposes, which contain biases such as familiarity with the game and favorite characters. By developing a bespoke game designed specifically for the purpose of exploring morality, these potential biases can be reduced. Before designing the game, morality in existing video games is critically analyzed, using theories from moral psychology. From this, a game was developed to measure behavioral outcomes through which moral decisions are made with the aim to address biases that are inherent in commercial games. Then, the resultant game was used to investigate how participants make moral choices in video games.