I'll separate my list for both multiplayer and single player. Only one game per franchise
Single Player :
MGS2
Uncharted 2
Halo 2
Half-life 2
Dark Souls
Legend of Zelda wind waker
Secret of Mana
Doom 2016 (Just recently replayed it and now appreciate it more).
Resident Evil 4
Bio Shock 1
Just noticed my favorite single player games are the 2s lol.
Multiplayer:
Gears of War 4
Counter Strike Source
Halo 5
COD BO 1
BF 4
PUBG
Forza Horizon 3
Team Fortress 2
Kill Zone 2
Titan Fall 1