A video game, like most other forms of media, may be categorized into genres based on many factors such as method of game play, types of goals, art style and more. Because genres are dependent on content for definition, genres have changed and evolved as newer styles of video games have come into existence. Ever advancing technology and production values related to video game development have fostered more life-like and complex games which have in turn introduced or enhanced genre possibilities (e.g., virtual pets), pushed the boundaries of existing video gaming or in some cases add new possibilities in play (such as that seen with titles specifically designed for devices like Sony's EyeToy or Nintendo's Wii Remote). Some genres represent combinations of others, such as massively multiplayer online role-playing games, or, more commonly, MMORPGs. It is also common to see higher level genre terms that are collective in nature across all other genres such as with action, music/rhythm or horror-themed video games.
It’s safe to say that video games are for everyone the reason for that would be that all types of entertainment, styles and genre are incorporated into the games, it’s a matter of you finding the one game that defines you from: Core games - are generally defined by their intensity, depth of play or scale of production involved in their creation and can include games across a wide spectrum of genres, casual games - derive their name from their ease of accessibility, simple to understand game play and quick to grasp rule sets. Additionally, Casual games frequently support the ability to jump in and out of play on demand. Serious - games are games that are designed primarily to convey information or a learning experience of some sort to the player.
Some serious games may even fail to qualify as a video game in the traditional sense of the term. Also, educational software does not typically fall under this category (e.g., touch typing tutors, language learning, etc...) and the primary distinction would appear to be based on the title's primary goal as well as target age demographics. As with the other categories, this description is more of a guideline than a rule.
Lastly the education games - there are many different types and styles of educational games all the way from counting to spelling to games for kids and games for adults. Some other games do not have any particular targeted audience in mind and intended to simply educate or inform whoever views or plays the game.