In 2013, The Last of Us challenged players to survive a post-apocalypse where the very air could kill you if you let it. (LOL fiction can be fun!) That challenge got amped up a notch about a year later when Naughty Dog added the newly minted "Grounded" difficulty to the game. Supplies were scant, "Listen Mode" was disabled as was the HUD, enemies tripled their damage dealt and had boosted A.I. smarts, and your character's health was nearly impossible to gauge. This difficulty setting also introduced "Permadeath" runs, meaning you get one life to live, so you'…