Just finished the game. No idea how long I played, took me about 24-30 hours... yes... I did play A LOT these 3 days. Don't judge me! :swear:
Anyway, pistols and stealth is the way to go. I actually made it all the way through the game without setting of an alarm (that wasn't unavoidable or supposed to go off).
And in boss fights the pistols special ability is way to over powered compared to the other weapon special abilities. And along with the stealth special ability and armor upgrades that reduce ability cooldown you're pretty much a invisible killing machine.
Played as a very trusting guy and made friends with all except two people/factions I met. I was very professional and straight forward.
Gonna play as something not relying on stealth now. Probably more on grenades and submachineguns/shotguns and use more personal and hostile responses, as well as being more selective of my friends.
Love the game.