This is gonna be one of the nerdiest things I've ever written, but what fucks up any sort of Snatcher/MG connection is the Catastrophe - no one ever mentions it or refers to it, although in MGS, Chernoton is one of the targets Liquid Snake mentions nuking along with Tokyo and New York.87th wrote:You could see it as being in the same universe, but no more so than Snatcher and pre-Solid MetalGear.
What fucks up an MGS/Policenauts connection is Meryl - she's said to have worked in FOX-HOUND on Earth, buuut... well, Policenuats takes place in 2040, so you get this sorta "shouldn't Meryl be a lot older" thing going on, and you've got events in MGS4 that kinda screw with that too.
I guess Snatcher/Policenauts could exist in the same world, if you really wanted to draw a connection, but the events of the two are so disparate that you don't get any sort of concrete clues to it. Plus, Snatcher takes place 7 years after Policenauts, so there's not much conclusion you can draw. You get fun little Snatcher references in the game (Random Hajile being in the background of the Lorraine dying scene), but there's nothing you do like "Hey, we got this random order from the chief - we're to fire a phased particle beam at some place in Neo Kobe?"