Free to play browser based multiplayer games have gained quite a bit of popularity over the years, one of the largest contributors to this increase in popularity is a multiplayer browser based game called Runescape. Runescape is a free to play (or optional pay to play) Browser Based Game where you can go around gaining levels, doing quests, and socializing with other players.
Over time many players grow tired of the game mechanics of Runescape or they get angry with the game Moderators for banning their accounts as well as other reasons, so they want to move on to another massive multiplayer online game, unfortunately good quality browser based massive multiplayer online games are few and far between. Luckily there are sites like http://www.awesomemmos.com/ that have compiled a list of multiplayer games from all over the internet .