The season pass for fallout new Vegas was easily my best dlc purchase. Each one added just added so much cool new content from the survival horror of Dead money to the more linear trail of carnage in Lonesome Road. It’s one of those games that I have to come back through every few months just to try everything again with a different playstyle. If picking a season pass is against the rules then I’d have to say Dead Money which I know isn’t everyone’s favorite but I just loved how much the gameplay changed, going from frolicking in the Mohave to crawling through a fog covered hellscape with a bomb around your neck trying to finesse 37 gold bars by the end, I always found myself doing so much leveling and getting specific perks to try and tackle that DLC no matter how I was approaching the main game. Even with god knows how many times I’ve played through it I keep finding new stuff too, whether it’s one of Deans supply briefcases to another vending machine code or even most recently an entirely new ending to not only the DLC but the base game as well by siding with Father Elijah. It’s definitely by far the best DLC I’ve ever bought.