Ultraworld was quite a divisive (and unequivocally gorgeous) title when it released back in 2014. If you have a copy in your Steam library then it might be a good idea to reinstall it as a new add-on by the name of Exodus was just added.
This adds in a whole manner of features such as a final chapter, as well as a tweaked main storyline. Vacation mode is also enhanced to allow for positioning the camera wherever you like for pretty screenshots.
Finally, and most excitingly, is the addition of virtual reality support. Apparently this takes a bit of work to get going, however. The update is completely free for all owners of Ultraworld.