is a style of game in which minimal character limitations are placed on the gamer, allowing the gamer to roam and change a virtual world at will. In contrast to a progression-style game, a sandbox game emphazies roaming and allows a gamer to select tasks. Sandbox games: create engagement, are spaces in which to play, let people explore, have unknown outcomes, are observable, underspeciffy the design, are generative, encourage autonmoy, purpose is self-determined, lead to understanding best for performance, and most importantly end in learning & discovery. environment, object, rules.