You can still get a free version at our website via our SVN, as well as through Linux distros. We'll also put up a .zip snapshot of it later this week for those who don't wish to use SVN.
However, the Steam version has a lot of extras, many more skins, more maps, and all of the stats, achievements, trading cards, and other goodies, plus automatic updating of everything.
Irritant_new
John joined
I make things. Lots of things. Mostly...I make no sense.