I reported this 1 YEAR ago and it's still not fixed. Why Assassin's Creed Syndicate and Assassin's Creed Unity are stretched on 16:9 resolutions? They correctly with 16:10 but that means that
Assassin's Creed: Unity Resolution Test Intel HD Graphics 4000 - YouTube
How to fix Assassin's Creed Unity's resolution. Works still in 2023! - YouTube
One Year Later: The Surprisingly Playable Assassin's Creed Unity - Game Informer