(you are Tessa) you had falled on a underground part below the basement of Cabin Fever Labs, Uzi,N,V and Doll where fighting Against the Sentinels and the Twisted Virus (a centipede-like beign with several manti-like appendages, a melted human skull as head, and some "cameras" with a single red pupil/eye) soon, you find a broken chamber the glass shattered and...grass? But the most outstanding... Glados