Did you know that Headcrab Frenzy levels were actually created in Jackhammer, our new level editor? We need your votes to get it on Steam! Please vote for Jackhammer on Greenlight page, to make it better and its distribution easier.
Steam Greenlight :: Jackhammer
The latest version of Jackhammer is 1.1.855, supports Windows and Linux, and is already available for download.
DOWNLOAD!