Plot 1: You are the 15 ft to 30 ft experimented patient

Plot 2: You are the scientist who is caring for the giant/giantess patient

Plot 3: You have escaped the facility

Plot 4: You decide to become a super soldier

Plot 5: The angry giant patient tries to attack you.

Plot 6: You are the Giant, and you're about to go rampaging and destroying everything in your path.