A person who is new to gambling in online casinos may be hesitant to try his hand at it, as he is worried about how much money he would lose while trying to figure out how to play online. Most online casinos offer free games for a trial period that let beginners learn while they play and build up confidence to play for money.Have you wanted to play games in online casinos and logged on to a gambling website only to be confused by the various options available? If you have played live at casinos in Las Vegas or Atlantic City, then chances are that you will be familiar with table games such as roulette, blackjack and poker as well as the slot machines. Online casino games replicate these games except that they follow a 2-dimensional format, although you can almost ignore this fact in the best online games that feature life like 3D animations with vivid colors.For most beginners, although the prospect of playing online may seem exciting, there is always a niggling doubt as to how much money they would end up losing because they did not know how the games were played. Free casino games are a great introduction to playing at online casinos as beginners can learn while they play without the risk of losing their money.Here is a list of some of the popular free casino games based on reviews. All you have to do is register and open a guest account that allows you to play free for a limited trial period:Casino Slots: Slot machine games are popular as they are the easiest to understand. All it involves is spinning the reels and matching up two or more symbols on the win lines. Online casino slots start from small games featuring 3 reels and 3 lines (the original slot game) and can go up to as much as 5 reels and 9 lines.Video Poker: As with the traditional game of poker, online casinos allow you to play a single hand or if you are an expert, up to five hands at a time. In fact, some versions of online video poker allow you to play online with your friends so you feel like you are sitting at the table with them and gambling.Roulette: The game of roulette online is identical to the real life roulette tables. You place your chips on a lucky number, color or section and then spin the wheel to see where the ball comes to rest.Most online casinos feature reviews of each game that provide information on the format and features of the game. In addition, the websites usually have an online casino guide that helps players familiarize themselves with how a particular game is played.