Massively multiplayer online games (MMOGs) offer a gaming experience that no other types of game can provide: a large-scale interaction involving hundreds or even thousands of players around the world. Depending on the player’s gaming appetite and preference, he or she has a wide selection of games to choose from:Role-playing games, known as MMORPGs, are the most common type of MMOG. As the name suggests, it lets the player assume the role of a character (often in a fantasy world) and takes control over many of that character’s actions. Most of these games are browser-based and have a simple infrastructure.MMOFPS involves a large number of players working on a projectile weapon-based combat through a first-person perspective. The use of 3-D graphics has become integral to most of today’s first-person shooter games.MMORTS combine real-time strategy (RTS) with a persistent world. Players often assume the role of a figurehead (general, king, etc.) leading an army into battle. The game normally features the building of a fortress or an entire city and frequent attempts at destroying opponents’ assets.Many of today’s MMOGs have become more reflective of the real society, accurately simulating certain aspects of the real world. They tend to be very specific to industries or activities, such as rocket science, airplanes, sports, and battle tanks, among others.