Hi. A little multiplayer game I've been a part of since 2005 has recently been migrated to steam and had an 'early release public opening'. Currently it's a civilization/economy game. Try to stay alive and try to get rich. Soon it will be expanded to allow for player-created 'planets'. It's called A Tractor.
'An old-fashioned, serious, social-economic simulation game that combines trading, vehicles, mini-games and blowing things up. And tractors.'
Here's a few screen shots. Come check it out!