Notorious Games announces Xsyon - Prelude is now available on Steam, calling this early access, even though this post-apocalypse, sandbox MMORPG had a sort soft launch more than two years ago. The Xsyon website mentions it actually landed on Steam a little over a week ago, but they've downlplayed this until now to make sure things were stable. They say being on Steam should allow them better community interaction as they complete the game. Here's more:

We're proud to announce the release of Xsyon : Prelude as an Early Access title on Steam. Early Access allows the development team better interaction with the player base to collect feedback and bug reports while furthering the progression of the game.

Currently Xsyon’s developers are working closely with players to balance and enhance its creature and combat systems. The game features unique systems including creature aging, breeding, increasing power through combat, looting players and migration. These systems are being revisited. Creature AI and path finding are being improved and taming with mounts and pets are currently in the works!