A game is a rule-based formal system with a variable and quantifiable outcome, where different outcomes are assigned different values, the player exerts effort in order to influence the outcome, the player feels attached to the outcome, and the consequences of the activity are optional and negotiable.
The term “computer games” is usually identified with the term of video game, only while playing computer games children are using only by computer. Computer games are more widespread because they can be used for fun and for learning. Usually, they have been categorized as: Shooting games, Fighting games, Strategies, Role-playing game or RPG and Massively multiplayer online role-playing game (MMORPG).