The Calculator is the main villain of Fallout Tactics. It is a supercomputer that was created as part of Vault-Tec's Enclave–manipulated social experiments and was made to act as the Overseer for Vault 0, where it had power over managing the vault's food supply and other resources for the cryogenically–frozen population. The Calculator is not truly a robot but actually a cyborg and multi–being, as its CPU is collectively made up of the cryogenically frozen brains of eight of Vault 0's most talented original residents: A scientist, a politician, a doctor, an artist, a lawyer, an Evangelist, a video game designer and a porn star.