There are thousands of help files available, offering valuable information for all things from "HELP STARTING GEAR" to "HELP DEATH". Typing HELP (keyword) might just give you the information you are looking for. - Catt
Beginning with the earliest MUDs (Multi User Dungeons), on through today's MUSHes, MUXes, MOOs, MUCKs and all the other varied offspring of the original MUD, there have been text-based multiuser games around since the early days of the Internet. But to connect to these MU*s, you generally need a client slightly more advanced than plain old telnet!
Atlantis is a client specifically designed to aid in playing those type of games. It is designed from the ground up entirely in Cocoa, and integrates with system services — such as the Mac OS X spellchecker — as much as possible.
TinTin++, aka tt++, is a free MUD client for Mac OS X, Linux, and Windows. The Windows port named WinTin++ (using the PuTTY terminal) is available for those who do not use Cygwin (A Linux/Unix emulator for Windows) and runs on Windows Xp, Windows Vista, and Windows 7. Besides MUDs, TinTin++ also works well with MUSH, Rogue, BBS, and Linux servers.