Probably Tales of Symphonia at 200+ hours, mostly because I've played it to completion 3 times. The closest to that would probably be Bayonetta 2 at 150+ hours.
I don't want to count Pokemon Y, which I clocked 600+ hours in. Even though most of that time was spent breeding Pokemon, that was primarily done for the multiplayer functions (battling and trading online).
Man, I get the love affair with Nintendo and Zelda.... I honestly do. But BOTW doesn't even crack my top 20 on playtime single player. counting multiple playthroughs, every final fantasy and dragon quest will win that. Even single player, Final Fantasy and Dragon quest and everything Bethesda win out.
I have no doubt Zelda would be up there if it had an achievement system or something but for fucks sake
camping the mount lord as a mount and figuring out there was no way to even keep it was a heart breaker.
Thread inspired me to pick up Skyrim, which I have never touched, even though I loved Morrowind and Oblivion back in the day. I only have a PS4 right now so I got Skyrim SE. Man the graphics are rough, especially after Horizon. Here's to hoping the game has the depth I've been looking for lately, which I honestly felt Horizon lacked. It was pretty and fun enough, but didn't hold my interest beyond the main story and a few side quests.
220 hours on Dragon's Dogma on PC. That doesn't include the time I played it on the PS3 too when Dark Arisen came out (or it was on Plus or something). I have no idea how long I played it then though...,
I went past 999 hours (the internal clock doesn't count past then) on Pokemon Y and the original Ruby version back in the day. Granted I played those games for like 3 years straight. I have hundreds of hours on each other mainline Pokemon game (barring Sun & Moon) as well.
I've replayed Fire Emblem 7 several times now. I'd say at least 120+ hours on that.
Most recently, I have 75 hours and counting on Breath of the Wild, and I'm nowhere near finished.
Oddly enough, Halo: CE might be my alltime high, just for the campaign. Across the Xbox, PC, emulated 360, Anniversary, and MCC versions... Maybe 200 hours? I've beaten it so many fucking times, replayed every level at least twenty times over.
Skyrim and Witcher 3 must be second and third, 150 hours each.
I think I played 75 hours of Fallout: New Vegas and 50+ hours of GTA V. I'm guessing I spent 40ish hours on Twilight Princess.
Breath of the Wild is probably approaching 100 hours and I've only done 47/120 shrines, 1/4 dungeons, found 94/900 Koroks, located 3/12 memories and I still need to visit four whole regions on the western side of the map (plus explore Eldin, Hyrule Ridge and Akkala in more detail.
Took 120+ hours, I think, to do everything, including the Monster Arena. Then playing the remasters and beating all the Dark Aeons and Penance as well as all the monsters... yeah, tons of time spent on that.