The full game will be released on September 13, but shockingly, there is a demo
I recommend giving it a go. The graphics are quite impressive coming from a new dev that built an engine from scratch. And if you like "old school" style shooters, the gameplay is pretty fun.
Oh, and the final release will have no DRM. That's exclusive of Steamworks, of course, although no one seems to have any idea how or to what extent that was implemented.