Blackjack

This extremely popular card game is a casino staple no matter which part of the world you are in. It is possibly the oldest casino game and is practically mandatory to have in a casino environment. 

There are many variants of the game, and every rule change affects the odds favouring the house. At its most basic, it is extremely simple and can be followed just as well by novices as it can be by experts. At its most complex, it can be broken down into a game of percentages and statistics by card counting and tracking cards as they are dealt.

-Picture courtesy Thinsktock-