http://blog.wolfire.com/2009/02/overgrowth-faq/
When will Overgrowth be released?
We do not really know when Overgrowth will be completed at this point and without a publisher or any external investors, we have the luxury of being able to release it when we want to. We will take as much time as is needed to get the game done right. If we tried to pick a specific date right now, we would probably get it wrong and disappoint a lot of people.
With that said, every week we give our preorderers a new build, so even though the game is not officially released, it is possible to get a hold of it. We will have a better idea of how long this project will take as we continue to make progress.
What are Overgrowth’s system requirements?
Overgrowth is too early in its development for us to know for sure. We are targeting Mac OS X, Windows, and Linux. Overgrowth will support a number of graphics settings to help it run on older computers.
How will Overgrowth be different from Lugaru?
While Overgrowth will be inheriting the spirit of Lugaru’s tried and true combat system, it will also benefit from every cutting edge feature that our new Phoenix Engine has to offer. Fans can expect better graphics, better physics, more characters, more moves, great mod support, and co-operative multiplay.
What kinds of characters will there be in Overgrowth?
We are planning to include 5 character types in Overgrowth: rabbits, wolves, cats, rats and dogs. The main character is Turner, the rabbit from Lugaru.
Will Overgrowth be an open world game?
Many people have asked this, and everyone seems to have a slightly different definition of what an “open world” is. You can expect the Overgrowth single-player campaign to be fairly linear like Lugaru with hopefully a few major decisions along the way to spice things up.