Just browsing the internet, I came up with this little gem: http://www.warsow.net/
Yes, it is spelled Warsow.
It has been out for a while, I will admit that. However, it is a standalone game. Easy to pick up and play. Reminds me a LOT of quakeworld/cmpa. It is based of the Qfusion (loosly based Q2) engine, and uses a physics that resembles quakeworld (or painkiller). It's a free standalone release. It's in it's alpha state right now, but it looks and feels pretty awesome. There is a movie to show off the physics engine. I suggest you watch THIS before you play, or you might not be able to see the full potential of the game.
Yes, it is spelled Warsow.
It has been out for a while, I will admit that. However, it is a standalone game. Easy to pick up and play. Reminds me a LOT of quakeworld/cmpa. It is based of the Qfusion (loosly based Q2) engine, and uses a physics that resembles quakeworld (or painkiller). It's a free standalone release. It's in it's alpha state right now, but it looks and feels pretty awesome. There is a movie to show off the physics engine. I suggest you watch THIS before you play, or you might not be able to see the full potential of the game.