(Capcom's primary storyline)
Project: Ada was a project by The Family to "recreate" Ada Wong.
Derek C. Simmons, head of The Family, developed affections for Ada Wong, a Chinese agent, sometime before September 1998. When he implemented the Sterilization Operation, destroying Raccoon City in response to a viral outbreak, Ada left his company.
Obsessed with getting her back, Simmons went through over 12,000 experiments in trying to create his own Ada Wong, eventually using the C-Virus' creator, Carla Radames as a subject.