There are a lot of different types of gamers, some play the games for fun or just complete the story and move on to other but some just want to complete the game in the hardest way possible and surprise everyone else by doing. It’s definitely an achievement and recently a fan of Fallout has completed Fallout: New Vegas without dying or killing.
Fallout New Vegas player, Rhetam started the challenge a year ago back in 2017 when he decided to see if he could complete the main missions and every side quest in the hardest way possible on the hardcore mode and with permadeath enabled. Furthermore without dying or without even killing anyone else than using boxing gloves.
You might be thinking that it’s impossible but after a year of trying, Rhetam has completed the challenge. He then went on to share his achievement on Youtube and everyone is in shock just as you are right now.
Rhetam used boxing gloves to knock people unconscious but didn’t kill them and he also trapped enemies by luring enemies into nearby allies that would help him allowing him to not kill anyone.