There are many types of Rummy that you can play in the comfort of your own home or in the added comfort of Internet rummy rooms or online casino rooms. You can play most of them with tiles or cards. All Rummy games have a similar objective in the sense that you try to make a hand, will discard cards or tiles and draw new ones from the ones discarded by the player to act before you or from a deck or stack of tiles. The key in rummy games is to form hands in what is known as melds (runs or sets). The one that does this the fastest will usually win in most possible Rummy games. 
If we think about Rummy games being played with cards instead of tiles you should know that in most Western countries we are in front of the second most popular type of card games. The only game that is more popular is Poker. What is interesting is the fact that this statistic only talks about rummy games that are played with cards. We also have rummy games that you can play with tiles and if we also take into account Chinese Mahjong and all the western Rummy games we now that around 700 million people from around the world are playing such game types. We are thus in front of a game that is really popular although not that advertised as other casino games possible. Rummy games are close in popularity with games like Chess, Monopoly and Scrabble.
Just as with poker games, Rummy includes many variations, some more popular than the others. The problem is that we are usually faced with different rules used in different countries. Also, the exact same game might even be played under different names. You can imagine how confusing this can be.
If we were to characterize Rummy games based on rule types you should know that we have basic rummy games (like Kaluki, Three Thirteen, Proter, Umtali and Rummy), conquian rummy games (like conquian or Pitty Pat), Asian Rummy Games (like Okey, Mah Jong and Quan Dui), contract rummy games (like Push, Jamaican Kalooki and Telefunken), Knock rummy games (like Gin Rummy and Tonk), Manipulation Rummy games (like Rummikub), meld scoring rummy games (like Romanian Tile rummy, Si Se Pai and Indonesian Remi) and canasta rummy games (like Canasta, New Canasta, Samba and Burraco).
What is interesting with Rummy games of all types is the fact that it is really easy to learn how to play but in most situations it is not really easy to become a very good player. In most rummy games you do need to be very attentive and skill that is combined with experience is necessary. This is especially true in the event that you are considering playing for money in regular casinos or online casinos. We recommend that you seriously consider playing online rummy games for free so that you can practice and learn everything that has to be learned from drawing rules of different rummy variations to rummy game strategy required to be a winner. You can play at any point in time and this is an advantage that you can never gain in real life.