MMO is a short name of "Massively Multiplayer Online". A MMO game is a multiplayer video game which is able to support a lot of players at the same time. By necessity, they are played on the Internet. There are a few differences between MMOG and other online games. Most MMOGs charge the player a monthly or bimonthly fee to have access to the game's servers, and therefore to online play. There are 6 MMO Games on GaHe.com, and all of them can be played online for free, enjoy!