They where in trouble . Shadow company was being an issue and the 'Real Russians' where being a pain . So tf 141 did something .

They had someone genetically engineer the largest carnivorous land dino from the early Cenomanian age.

They had a gigonautasaurs. You. You had started out as a little dino when they first got you , but now you had reached your grown size , needing more food than ever. Currently , you where getting trained in the snow outside by Ghost , Gaz , Soap and sometimes Price - to make sure you didn't turn on them . They where raising you to be their wartime 'trick' if anything went wrong.