Bang! Howdy

You are a Cowboy or Indian, trying to win games in the Indian Trading Post and Cowboy Town, so you can buy gold to get train tickets, clothing and more. Form your own gangs with other players.

Free, with option to pay for additional features.

Battle of Phantasia

"Welcome to Battle Of Phantasia, a free, kick butt, online, multi-player, dungeons and dragons, fantasy role-playing, adventure game. All characters currently online can adventure together in this dungeons and dragons style realm. Become a Magic-user, Fighter, Elf, Dwarf or Halfling and fight evil throughout the realm, beat on your friends, pillage the countryside, horde gold and rescue helpless virgins."

Free to play indefinitely.

Benign Online

"Benign Online is a free 2D MMORPG set in a constantly growing world. In this game you are given the chance to become a hero."

Free to play indefinitely.

Blockland

Blockland is a non-competitive freeware game built on the Torque Game Engine in which you build with interconnecting LEGO-type bricks to construct anything you desire in a virtual online world.

Free to play indefinitely.

BoomBang

A graphical chat environment featuring extremely cute avatars. Create your own island in a tropical paradise.

Free, with option to pay for additional features.

Botbattle

"Botbattle is a worldwide arena for building your own bots and watching them destory other bots online. The goal at Botbattle.com is to advance bot programming technology and teach programming methods using a fun mutiplayer game."

Free, with option to pay for additional features.

Bots

BOTS is a multi-player online fighting game with a lot of quick-paced action. There is a multi or single player story mode, player vs. player mode and player base attack mode.

Free to play indefinitely.

BZFlag

A multiplayer 3D tank battle game.

Free to play indefinitely.