For me it's Resident Evil 5.
I never have played the original three games and RE4 was my first one into the franchise that I really didn't end up liking even after trying multiple attempts on it since I was in only middle school when I first played it back in 2008 and thought I would like it a couple years later......that end up not happening. Resident Evil 5 I pretty much got a couple months after it released and picked it up as a whim when my cousin came to visit me. We became glued to this game pretty much due the cooperative aspect, even after he went back home we played it online and I even played it with randoms if he wasn't available. I've heard it sucks going through the game solo especially with the AI but I don't really recall ever playing through the game solo before. It definitely was one of my most memorable and favorite coop experiences just replaying through the game countless times. Nothing in the series really came close to it, maybe RE7 and RE2R but I definitely didn't have as much fun replaying those as to RE5 and while I like some of the multiplayer and action bits of RE6 kinda like re4 I wasn't vibing with the game.
I do need to play the Revelation games as I heard they're solid as well, especially the raid mode.
I never have played the original three games and RE4 was my first one into the franchise that I really didn't end up liking even after trying multiple attempts on it since I was in only middle school when I first played it back in 2008 and thought I would like it a couple years later......that end up not happening. Resident Evil 5 I pretty much got a couple months after it released and picked it up as a whim when my cousin came to visit me. We became glued to this game pretty much due the cooperative aspect, even after he went back home we played it online and I even played it with randoms if he wasn't available. I've heard it sucks going through the game solo especially with the AI but I don't really recall ever playing through the game solo before. It definitely was one of my most memorable and favorite coop experiences just replaying through the game countless times. Nothing in the series really came close to it, maybe RE7 and RE2R but I definitely didn't have as much fun replaying those as to RE5 and while I like some of the multiplayer and action bits of RE6 kinda like re4 I wasn't vibing with the game.
I do need to play the Revelation games as I heard they're solid as well, especially the raid mode.