Chemist (Zombie Night Terror)

Chemist is the main antagonist of indie strategy/puzzle horror game titled Zombie Night Terror. He is the mad scientist whom created Chilli Z, mutagenic drugs that would turned those whom overdosed from consuming them into zombies. Worse, it's also implied that he is the perperator of zombie apocalypse that started since the first zombie outbreak in the first place.

Background and Early Days of Zombie Apocalypse
Chemist has worked on a new form of drug called Chilli Z, or at least it was the said drug's name. He mass-produced the drugs and sold it to a drug dealer in the town's black market. Reason why he sold them to the drug dealer may either to get some money for further experiments with the said drug, created his own Romero-esque zombie apocalypse, or both because he was insane. But regardless of the case, he has worked on the drugs in considerable amount of time.

The chemist has perfected his drugs by the time the zombie apocalypse began, where the first outbreak started in the downtown. A drug addict named Bill, whom consumed some Chilli Z drugs and implored the girls around him to try some of them, ultimately overdosed and cough up blood. As the chemist intended, something horrific happened: Bill's body began to degenerated whilst producing mutated pathogen that spread all over his body. Succumbed by the mutated pathogen that ultimately degenerated his hippopocampus, Bill turned into zombie and bite nearby bystanders one by one to death. To make matter worse, the mutated pathogen in Bill's body during the infection has incorporated chemical composition of Chilli Z drugs that he recently consumed into their biological processes, which means his bites and scratches would turned his victims into zombie like him as well.

Whilst the outbreak that occured in downtown was bad, zombie apocalypse has started since that night: On the same night, newly buried corpses in cemetery rises from the grave and turned into zombie like Bill himself, killing many people that stood in their path and turned them into zombies as well. The explanation on how this happened was likely the result of Chemist's earliest experiment with his Chilli Z drugs, as he has unknowingly spilled some chemical composition of Chilli Z drug to the outside world and spread across the planet. How the mutagenic composition of the Chemist's drugs spread to entire world suggested to be either water-borne, air-borne, or both. But in either way, nearly almost human populate on earth (with exception of those whom immune) had their bodies affected by the mutagenic chemicals, but is yet to suffer the symptoms of Chilli Z's zombification except that should they died with any reason (with the exception of the severe brain damage), their death would trigger the chemicals' production of mutated pathogen that immediately reanimate them into zombie.