(Operation Raccoon City's backstory)
Ada Wong was first seen by Delta Team inside the Raccoon City Underground Laboratory. The U.S.S. Command ordered her execution, using a hospital extraction as a possible reward for doing so. Ada escaped from their grasp, but was later seen on security cameras supposedly dying in Leon's arms.
As with Nicholai Ginovaef in Story Mode, Ada has a boss battle where the player must try to dodge her attacks (grenades and firepower) as well as trying to deactivate the various traps set by her. As soon the player reaches her, she will escape and the player(s) must pursue her through the lab.
Ada is a playable character in Heroes Mode, where she is part of the U.S.S. team. Her abilities are:
- First Aid Proficiency
- Quick Reload
- Incendiary Rounds
- Neutralize Infection
- "Huh!? They're already on to me?"
- "I'm going in."