I have nearly 3500 hours into Apex Legends (played competitively a little in college)

Also somewhere in the realm of 800 hours into factorio, a good 500 into Skyrim and literally uncounted thousands of hours into minecraft.

If we count map editors then most likely C&C: Generals: Zero Hour or ARMA 3.

If we don't could editors then probably Halo 3 or MW2, maybe Stellaris.

Before the community died off I had put just under 20,000 hours into Subspace / Continuum (mostly on EG). No, that's not a typo. I learned what addiction looks like as I grew older.

Between that, NexusTK, The Realm and an unhealthy obsession with SNES JRPGs I don't know how I managed to make it through grade / high school...

I believe the game I have the highest number of hours in is League of Legends, but I don't know the exact amount because at a certain point riot changed their API and the tracking site I used reset. But the highest it was ever at was 2,376 hours. The highest games I currently can still track are Skyrim with 789.5 hours and Skyrim legendary edition at 241 hours, then Stardew Valley with 953 hours, Fallout New Vegas with 612 hours, and Final Fantasy 6 with 557 hours(this was one campaign.). Everything after that is sub-500, but I give an honorable mention to Dark Souls 3, at 441 hours.

They've reset mine twice before many years ago. I'm sure Minecraft is my top overall. In steam it says Metal Gear Solid 5 is my top but I would leave it running sometimes for the research to finish. Second is Garry's Mod. I played that A LOT when I was younger.

I probably have years of playtime on Super Smash Bros. Melee for Nintendo GameCube

Borderlands 2

Dead By Daylight has consumed more of my life than any other game at 1600 hours (since 2018), and that’s still rookie territory. I’ve never been able to commit to a game for very long, maybe 40-80 hours max and that was only two or three games in my life. DBD just has a hold on me.

I would guess I have multiple thousands of hours across the Halo and Pokemon series. My highest played steam game is dead by daylight (gross) at 1k hours. Deep Rock Galactic and PUBG are at around 500.

Breath of the Wild. I put about 300 hours into it.

Looking at 600+ hours in Rimworld, and probably even more in Dwarf Fortress but 200+ since the Steam release, it wasn't tracked before.

killing floor 1

Path of Exile. It literally captures you once you take a grasp on game mechanics and find an interesting character build.

Oh boy, theres a lot to talk about chatacter building.

Theres no ARPG game in the market with such complexity in planning your character. Dopamine hits when you reach your build's peak and while you chase for milestones, like upgrading gear, leveling, bossing, etc. Leagues are breath of fresh air, introducing expansions + new content, also possibility to start a fresh character in fresh ladder & economy.

Playing PoE with pals in a guild and sharing milestones, moments, items & currency, helping each other with progression sucks you even further in.

Its so addictive that I've had to stop playing it, because it takes so much of your time. But I don't regret playing it. Good times.

CS:GO 5000+ hours wasted in my 20s

Either Sims or Transport tycoon Duluxe

EverQuest 1. Diablo 1,2,and 3. Cities skylines. Forgot about terraria.

Probably Terraria

Call of Duty Modern Warfare

The Elder Scrolls Online

Path of Exile, around 3k hours and it is still my favorite. Every 3 months you get to play again with a different twist, and Path of Exile 2 (just an update, but a huge one) is being worked on and will likely release next year.

Hard to say for certain but on Xbox it would have to be Halo MCC or The Witcher 3. I also played a lot of World of Warcraft back in the day so that’s probably up there too.

League of Legends, no doubt (and no idea how many hours across my two main accounts). Just... yikes on a bike, that one.

Other tops probably Sims if I can count all the different games. Stardew and animal crossing are up there as well, I'm sure.

I'm over 10k hours on FFXIV, been playing since launch. Could get an exact answer when i get home. Next closest is Skyrim with around 1,500.

Edit: it's over 14k hours, more than 584 days worth. It'd be much more if I had more time the last two years but I can't do much than dailies with a 15 month old!

1200 hours on Halo The Master Chief Collection on steam. And absolutely countless more on Halo Reach on the Xbox 360.

Quake Champions for sure. Best competitive shooter I've ever played (and I've tried all the popular ones), great option if you like movement & aim centric games

AOE II was my childhood. I played that game for years.

1. RDR2 - 2,225 hours
2. MGSV - 1,388 hours
3. TW3 - 645 hours

I'm sure SMW is the real 3rd. place, but I don't have the numbers.