In recent years business consultants have found a growing market for courses to encourage people to laugh, as there are apparently real health benefits in laughing aloud.
Ever since the commercial video games industry was born in the 1970's, companies around the world have been making hundreds of different games for various platforms.
As with all video games, choosing between genres of game can be tricky, especially when some games are developed which blur the boundaries between particular genres.
Even before video games made onto PCs in the 90's, different genres of video games were beginning to be established.