I've been playing Armageddon for about a year now, and I think it's only right that I give this MUD the credit it so dearly deserves.
I don't know where to start, really. To say that this is the best MUD ever would be an understatement. It's one of the greatest games I've participated in. The experiences I've had with this game are some of the best I've had in my life. I feel like it's helped me grow as a reader, writer, and person. It's a work of art, it truly is.
The first thing to probably catch a newbie’s eye is the constant reminders plastered all over the web site that Armageddon is a strict role-playing game, which it truly is. People here are serious about role-play, and will kick your butt if you don't at least attempt to play along with them. (Note: By 'kick your butt', I don't mean that they will kill your character. I mean that you will face warnings, OOC punishments, bannings and the like if you willfully ignore the rules and environment). However, don't let this deter you! Armageddon, in its vastness and complexity, can seem rather daunting at times, but it's nothing to be afraid of. The players are willing to help you learn; just follow their lead, and you'll be a true role-player in no time! Even if you've never attempted an RPI MUD before, don't worry. Armageddon has an active discussion board, a team of helpers, extensive documentation and a helpful player base willing to show you the ropes. Even if you're uncertain as to what 'good role-play' is, you should still give Armageddon a chance. You'll quickly learn!
One thing I often tell people is that playing Arm is like reading, writing, and acting all rolled into one. If you're a good writing, you'll enjoy using the complex emote system to immerse other players in Arm's harsh desert world. If you're a good reader, you'll be able to picture yourself in the setting, allowing you to play realistically and interact with other players on a deeper level. If you're an actor, you'll find your ability to 'get into character', that is, think how your character thinks and act how your character acts, will be very useful. Staying in character is vital to enjoying Armageddon, and if you're used to that sort of thing, so much the better.
The best part of Armageddon, in my opinion, is the players and the plots. Everyone is up to something, and there is plenty to do in Zalanthas! Other MUDs often depend on Imms to initiate quests, but Armageddon is almost completely player-driven. You'll experience everything from subtle political schemes to screaming moments of chaotic warfare. You'll see cold blooded assassinations and jovial drinking contests. Don't get me wrong, we have a wonderfully dedicated staff, but it's amazing to think that the economy, history, culture and atmosphere of Armageddon is created and perpetuated almost solely by the players.
Anyways, my advice to you is as long as you have the tiniest bit of interest in serious role-play you should give Armageddon a chance. The flavor, world, and people of Armageddon are so captivating that I'm sure you'll quickly see why this is, in my opinion, the greatest game ever made.