here's what i recall of it:

i was in this contained city that was somewhat a giant lab experiment of sorts
odd creatures habitated the city and humans were test subjects/ scientists
upon looking around with my group, i end up tagging along with a classmate and get detached from the group for a while, after talking about some of the work we've done, she temporarily leaves as i stumble upon this lizard-ish being that looked adorable as hell, i was curious why it stared at me like that when i looked at it being stuck behind a fence that was easily escapable for the lil guy, little did i know i had been struck on my waistline
returning to my group afterwards since my classmate noticed me after the lizard-ish creature (who was black, had a sheen of silver on, and hues of cyan and fin like spikes) ran away, she tells me a higher up wanted to talk to me
after some walking and returning to the halls of which students and scientists could be seen, i meet up with the scientist and he tells me of that creature i encountered and asks if i noticed the odd behavior it did, only to feel a pain/soreness upon the struck area upon my back as i looked at the scientist confused
he says that the creature did something to me of which it was confused for that 'odd pebble' he threw, should've knocked me out but instead did something else
later on after returning to my classmates, some creatures had gotten into the lab and were attacking students and scientists alike, that's when i was running back and forth trying to help people out only to see that lizard-ish creature larger than before, running across the hallway and looked at me suprised and confused as it saw me stand there
a sharp pain could be felt as it spread across my body, feeling sore as i grunted, hands, feet, legs, every part of my body changed and grew larger as a scientist and a few people across the hallway saw me change
after changing and seeing bits of my clothing torn off , i looked upon myself as the creature stared at me with wide open eyes, shocked of what happened to me as another creature started attacking it, only now did i realize it was trying to protect a younger classmate, its tail coiled around him to protect him from harm
I saw the creature pick up pebbles from the ground and throw them as fast as bullets at those corrupted beings that were trying to attack it, still heavily dizzy from the transformation i noticed my classmates being surrounded by some deadly looking insect-like creatures as i rushed over to them, i could feel my footsteps making dents on the damaged floor as i punched and kicked the attackers, grabbing a broken pipe that i managed to yank out from nearby out of a broken wall and smack the hell out of the insects, watching them run away in fear, my classmates stared at me as i stood there as this large lizard being, only to have my large tail hugged by a female student exclaiming i was adorable-looking and the fact i helped them out
last bit i remember upon waking up was helping my classmates get some harmed students and scientists to the medical bay