Serum is a world that has been taken over by a toxic substance that either kills or transforms everything it touches. Luckily, you'll have a device attached to you that delivers the serum to prolong your life.
In Serum, you'll do many of the familiar things that come with survival games like find a shelter, craft new tools and materials, and gather resources. The big twist is of course the serum itself. Just imagine all the regular stressors of a survival game with a timer attached to ramp up the pressure.
However, using the serum itself isn't just as simple as taking your medicine and going on your merry way. You get to craft a variety of types of the serum, which will enhance and change your abilities. Using the different types to your advantage will be key to your survival.