Steam has added CrimeCraft: Bleedout to it’s list of Free to Play (F2P) games. They say it’s a 3rd person shooter set in in a persistant world. Sounds very interesting actually.
BLEEDOUT is first major content expansion to the Free to Play Massively Multiplayer Online Role-Playing Shooter Crimecraft
Sounds like the free version is very limited though according to this post by Todoran_Virgil on the Steam Forums:
The Bleedout content update along with Episode 1 of the Campaign are available to all players for free. Full access to the campaign is given to users with Deluxe or Premium CrimeCraft Memberships
If you have a new account < 7 day sold you’ll receive a special Steam Welcome Package if you play before August 29, 2011.