Chess has been branded by the videogame industry as "casual" as has a lot of other boardgame and cardgame stuff. And there is a degree of irony behind this also.
Anyhow, this being said, what is the opposite of "casual"? People say "hardcore"? That had meant games with bad interfaces that are not easy to get into and dedicated to fanatics. Well, it had since gone on to mean, "games for the teen demographic with lots of sex and/or carnage" like Modern Warfare.
A good game, with universal appeal, is easy to get into, but has a lot of depth to it. That is a sign of a good game. It can be played, and enjoyed, on a lot of levels.
Ok, let me give you another definition of "casual" gaming. These games are considered to have lower development costs, and broader appeal. The opposite, with broad appeal, is consider also "hardcore" gaming and consists of games with monster development budget costs. These games, on the whole, will bankrupt the videogame industry, if they keep thinking increased production costs are the magic bullet.
