heyyy players look i fucked up big time but its fixed now. i forgot to add the 100% achievement to steam even though the game had it. this is a super common mistake and i bet even u did it at some point too. we are planning a meeting with shareholders and will pay them tens of millions of dollars as a sincere apology to the playerbase.
if u somehow got 100% (no u didnt lol) then u can just Log In to ur save file and collect this achievement so u can show ur grandma or other