Since there's already a ribbon showing on 100%-completed games in your library, Steam should officially give players a Ribbon for every 100%-completed game, so that players can showcase them on their profile
Steam Community :: Guide :: HITMAN™ Achievement Guide
Fix Steam Achievements Not Showing Up Or Unlocking (2023)
Hitman 3 Achievements - Steam - Exophase.com
Steam Community :: Guide :: HITMAN™ Achievement Guide
I now have all Hitman Steam achievements apart from 3 in Absolution (They're unobtainable anymore, Trust me I tried again today the server is still down) : r/HiTMAN
Hitman 3 - Year 2 Update (Jan 20, 2022) - #365 by Adil15101 - Hitman 3 (2021) - Hitman Forum
After a month of playing, finally managed to get it done. 100% on steam. : r/HiTMAN
Steam Achievements Have Been Added for New York : r/HiTMAN
Steam Community :: Guide :: HITMAN™ 2 Achievement Guide
That One Achievement - TV Tropes
Steam Community :: Guide :: HITMAN™ Achievement Guide
Steam Community :: Guide :: HITMAN™ Achievement Guide
Steam Community :: Guide :: HITMAN™ 2 Achievement Guide
Hitman 3 guide: All achievements and trophies - Polygon
Can you cheat Steam achievements? - Quora
Hitman Achievement Guide & Road Map
HITMAN Achievements | TrueAchievements
Hitman 3 Trophy and Achievement Guide - Dayngls' - Guides For Games
Steam Community :: Guide :: HITMAN™ Achievement Guide