1. Halo 5 (WHAT DID YOU DO TO MY BELOVED HALO SERIES?)
2. Any of the Sonic games after the 2D era
3. Five Nights at Freddy's
4. Unreal Tournament 2003 (WHAT DID YOU DO TO MY BELOVED UNREAL TOURNAMENT SERIES?)
5. Unreal Tournament 3 (WHAT DID YOU DO TO MY BELOVED UNREAL TOURNAMENT SERIES? v2.0)
... Actually, UT3 is in a weird spot because I still really like the base gameplay of it. At very least, it's a big improvement over UT2003/2004's floaty hitscan-dominated games. BUT NEVERTHELESS, it was horribly consolized, buggy, and stripped down. And to make matters worse, they decided to Gears-of-Warify it because... I don't know? And this is coming from someone who really liked Gears of War as well, so you know I mean it when I say that. But perhaps worst of all, it killed the series almost entirely. Way in the future, we would get UT4 but development on that has been slow and now it's literally not even happening because Fortnite.