The definition of a game for learning is widely interpreted and is dependent on what the player is learning from the game. For the purpose of this entry, the phrase a learning game is defined as involving (a) a player or players who engage in achieving a goal or meeting a challenge, (b) rules for play and rubrics for measuring or scoring performance, (c) features such as interactivity and feedback, and (d) emotional or cognitive immersion. This entry centers on games in the medical profession, with particular attention paid to preferred gaming terminology, the process of designing serious games, and the use of serious games for use in medical training.