Massively multiplayer online first-person shooter (MMOFPS) is a category of computer games that combines first-person shooter gameplay with a large number of simultaneous players over the Internet. It is a category of massively multiplayer online games.
Unlike a traditional online or multiplayer FPS, a MMOFPS can use interconnected zones or areas to create a larger world in which thousands of players can interract. Example MMOFPS games include World War II Online (2001) and PlanetSide (2003).
Due to the technical issues introduced with large numbers of simultaneous players, few MMOFPS games have been developed. MMOFPS games tend to require more powerful computers than MMORPGs to meet the demands of faster gameplay. MMOFPS developers also have to be more concerned about lag since reaction times must be swift and MMOG servers tend to be in a centralized location (which might not be convenient for players a long distance from there).
As with many massively multiplayer games, most MMOFPS games charge a monthly fee to play. This pays for the maintenance costs for the servers and bandwidth as well as a "live" development team to update the game and fix bugs as needed.