Umbrella Corporation

The Umbrella Corporation is a massive organisation that acts as the faceless villain of almost all Resident Evil games, it is so massive that it is termed as a mega-company: having subdivisions in almost every business imaginable and even having its own paramilitary force.

The Umbrella Corporation is most infamous for being largely responsible for the infection that sweeps across Racoon City (and other areas of the world) due to the creation of several highly volatile mutagenic viruses and parasites - the most famous being the G-Virus, T-Virus and Nemesis Parasite.

In addition many of the game's major antagonists have connections to the Umbrella Corporation, making it arguably the true antagonist of the series (though some would say that title belongs to Albert Wesker).