The Unity 4 engine has given Flash gaming a lot of TLC by simplifying web ports of complex projects. If you ask Unity Technologies, however, that love isn't being requited -- and the company feels jilted enough to stop offering new Flash licenses, effective immediately. Adobe supposedly isn't committed enough to the plugin, having halted work on both a re-engineered Flash Player Next as well as an attractive revenue sharing model.
Unity is equally concerned about the broader developer community shying away from Flash at the same time as its own plugin, Unity Web Player, has soared past 200 million installs. While those with existing licenses should have Flash support for as long as versions of Unity 4 are in the field, the exit is bound to have game creators scrambling to find alternatives for any future web-based titles.