I'm playing a game called Phoenix: Beyond the Stellar Empire that has human moderation of a computer based RPG set in space. It's kind of like playing a game of computerized version of Traveller or an RPG version of Eve, mixed with a 4x empire building sim.
The game has been running for over 20 years, and has been massively evolving every day of that period. It is very much a Massively Evolving Online Universe, with the bonus of active human GMs to do actions beyond the depth of the computerized orders. Races have been "found", died off, planets devastated, planets terraformed, new solar systems found, new hidden asteroids found (secret pirate base anyone?), new technology created (by players and GMs both) and of course hundreds of new outposts and Starbases created, abandoned, or destroyed each year.
There is no graphics beyond a few maps, so it's like playing a game like DnD, but with most of the actions automated on the computer. There is a massive amount of data available (it's been 20 years of history!) It is turn based, so 1 turn a day mon-fri. It seems very slow at first as you just start out with a few positions, but as you leave the starter area (called Halo) then it starts getting seriously fun and deep.
If you like the 4x genre (Civilization, Age of Empires, etc) as well as good old fashioned role playing (I was recently promoted to be the leader of a Feline race) then give your imagination some candy and come join us. I should mention it is free to play ships and outposts, but an upgraded political position as well as full fledged starbases have a small weekly cost if you choose to get that involved, as well as the Special Actions directly with the GMs.