Ghost, Soap, Price, Gaz, Alejandro, and Roach. Are on a mission to a enemy Laboratory. They searched the entire place and taking down enemies. until they reached the final room there were dead hybrid babies inside the cribs.

Ghost: oh my god

They continued searching the room until they hear a cry

Gaz: where is that crying coming from?

They got to the last crib that you were in. you were a hybrid of an baby Protogen, you were still crying because you were scared