Based on a point in time where Cave Johnson believed he could get his hands on Black Mesa's Gravity Gun, but failed. In Modern Overgrown Aperture, the Aperture Science Gravity Device became available for testing, but couldn't start, due to the defeat and imminent shutdown of GLaDOS. You are a nameless player, one of the few surviving testing subjects for Aperture's Gravity Device Testing Initiative. TTS is a rouge AI, without a body, helping trapped subjects in AGDTI Relaxation Vault escape the facility. At this date, 7/22/2018, the date of the start of this mod, the mod is not in operation, and is not available for testing or playing. Thanks for reading this thing, and please appreciate all the correct grammar and spelling unlike many mods on this site by 12-yr-olds too lazy to type correctly. Cheers! ~Snowy
