If you're unfamiliar with Odyssey, here's a great summary by an anon from the first server:
>Some hermit spent the last decade (probably more) turning UO into his own sandbox adventure game so you can enjoy it alone or with a small party
>It's very focused on exploration, it's a bunch of new world maps filled with towns and dungeons, you have to look for clues to figure out the paths between worlds.
>A lot of skills were rebalanced or extensively changed so they aren't completely useless.
>For crafting professions, if you acquire a house you can open up a shop and get crafting contracts.
>There isn't a storyline, quests are all random. Quest boards in town can give you random contracts like killing a lizard in a dungeon you've never heard of. You can also find epic quest books asking you to collect a bunch of unique items nobody knows where they were buried. You can listen to the random NPCs dialogue in town to sometimes get hints at where things are located.
>Resurrecting eats away your skill points if you can't pay the tribute, the traps in dungeons are brutal (I've had one reverse my karma once so I had to live in spooky town underground for a while as good-aligned town guards hated me), there are random portals in the overworld that can send you deep into hell or summon demons to rip your asshole in two if you're not careful
>I tried hosting it locally to play with friends and we had a good time, the world is really big so you can all do your own thing if you want to. Adventuring in groups is also fun as you can cover your asses in case someone gets fucked by a trap or a boss, we've had to organize a few rescue operations to recover the corpses of characters that made bad decisions. There's a lot of funny builds you can try out, depending on your character origin you can also get higher skill caps to expand possibilities