Ever wondered what your favorite modern engine mod would look like when it was released in 1992? With Pixel Eater's mod Vanilla Essence 4 you can exactly have that experience, it makes entering and exiting vanilla mode easy with a single key bind. You can even configure it to your needs and personal taste. I tried it with Blade of Agony and it actually worked like a charm. Wanna try it yourself? Check the release thread over at ZDoom.org.