Serum – In a desolate, post-apocalyptic world shrouded in toxic fog, every second is a fight for survival. As you unravel the mystery behind Serum, a relentless timer on your arm constantly reminds you that life and death hinge on your every decision. Explore diverse biomes to gather precious resources and brew unique serums that boost your abilities and modify your weapons, giving you an edge over mutated foes.