Dennaton Interactive Design announces internal testing is complete on the level editor for Hotline Miami 2, and that the beta of the level editor will be released on Steam on December 10th (thanks GameSpot). They say this will be for Windows only, but Linux and OS X support will eventually be added. They list 11 different important points about this, and offer the following overview:

The testing period for the Hotline Miami 2 level editor with Testronic is over and we are very happy with the results! There were tons of bugs found and fixed so the core of the editor feels very stable now. While the cut-scene creator and campaign editor still have some nasty bugs, Jonatan and Abstraction are going to take care of them soon and get those features all smoothed out as well.

So without any further delay we're excited to announce:

THE BETA VERSION OF THE EDITOR WILL BE UP ON STEAM ON THE 10TH OF DECEMBER!

We've added some extra time just to make sure that the date won't be pushed anymore. Thursday the 10th of December is the day. More details soon!