These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: I Am Alive
Big Lipped Alligator Moment: If you explore around, you can find a gorilla-like dancing mutant (or possibly just a severely deformed human) living down in the dust cloud. He's never explained and doesn't play any role in the main plot, and clashes somewhat with the otherwise realistic tone of the story. Late in the game you can actually talk to him (he's surprisingly eloquent), and trade 5 difficult-to-find items to him for a pump-action shotgun.
Game Breaker: The bow. As soon as you get it, combat strategy boils down to: 1) melee or shoot the ones with guns (with the bow if possible), 2) intimidate with pistol to take the gun(s) and your arrow back if applicable, 3) switch to bow, kill a mook, and 4) switch back to gun to intimidate, repeating until victory. Even after the game starts throwing armored enemies into the mix, this strategy makes most encounters a cakewalk.