From the campaign:
OUTBREAK is a pen and paper Tabletop Role Playing Game System that is tailored to letting you play your choice of a variety of apocalyptic scenarios in the modern world. This game uses a custom, easy to use, 1d10 skill based system that we have been developing for the past two years. We decided to throw away the confusing experience point system during development. In Outbreak you level up once per game session so you can have a smoother game session and not have to keep tabs on thousands of experience points.