Look, flat out, there is no other text-based RPG like Gemstone 4. It is the single most profound, exciting, diverse, detailed text-based World you could ever find yourself experiencing.
I love it. I've played it since I was a teen. The game never dies. And it just keeps getting better and better. It used to be called Gemstone 3 back in the day. But it has since then been upgraded. Why not check it out? They give you the first month absolutely free of charge. After that it's only $14.95 a month. And trust me, it's worth it. Besides, even if you don't like it, after you've played it for the month, you can just cancel, and they won't charge you anything. So it's a win win situation.
PS - Make sure that you use the wizard program when you play. The newer ones are alright but they focus too much on the mouse. The key to this game is to be able to use the keyboard as much as possible. Because it's faster.
Here's the website:
Make sure you study before you play. I found out back in the day when I made sure I studied alot about the races, spell circles, action commands, etc., that it made it a heck of alot easier to play the game.