Browser Based (81)
Usually (but not always) first-person shooters, these web-based games allow you to roleplay in a graphical environment.
Multi-player games (usually but not always text-based) where players can interact with each other in real time. A unique feature of MUDs is the ability for users to create things which can be left in the game, even after the player is long gone.
Massively Multiplayer Online (50)
From WarCraft to Everquest to the Sims, buy the software at your local computer store and game online with others across the Internet. Some of these are free.
Online Playing Facilities (56)
Sites that offer chat rooms, message boards, virtual table tops and other playing facilities
Play by Chat (99)
Fast action, quick story movement and single-session endings are the hallmark of the Chat game. Played on IRC or other chat program, these games require you to be online and play in real time.
Play by Email (110)
Email-based RPGs tend to use turns and long, story-centered plots. If you haven't a lot of time to devote, but can manage to put a block of time together each day or each week, try PbEM.
Play by Post (1102)
Post by Post gameplay. Play High Fantasy, Science Fiction, Gothic, and Horror web based on message boards and forums. Creativity is a must, so bring your imagination
Tournament Games@ (22)
This section is for Internet only games (Not PBEM)
Virtual Table Tops (12)
Web sites and software that allow GMs to display maps, character sheets, and other game info online