Learning games need to be what we call 'fun enough.' Many new learning-game developers try to design an entertaining game. Unfortunately, that often makes learning harder rather than easier. Remember, you are not creating the next great commercial game to entertain your learners; you are creating a learning game in which success will be measured by the achievement of learning outcomes. Resist the temptation to create a ton of rules, pile on different game elements, and incorporate multiple dynamics to keep player interest high. Yes, the game should be engaging with a mild level of fun, but learning should be the goal. Focus on engagement rather than entertainment. The goals of the game play should be interactivity and engagement. Research shows that what makes games instructional is the level of interactivity and engagement the learners have with the content. Given those parameters, making sure the learners are engaged and active is far more important than making sure they are entertained.