Ultima Online for sure. Glad the time wasn't tracked...

Guild Wars 2; I'm at 6-7k hours or so. Been playing a lot less lately; I'm not sure if that's the recent content, or if it's me getting tired of it. I don't have a ton of objectives I'm interested in completing at this point; some "nice to have"s, but at this point any character or build I could possibly want to play, I have just about everything I need for. Mostly find myself logging in twice a week to do guild night with friends, and that's it.

Otherwise, GTA V, which surprises pretty much everyone I know except the friends I play with. It's just such an easy game to spend hoursblowing each other up or racing around or whatever in; really a fantastic game to play with friends.

Probably Planetside 2, an online MMOFPS game.

Next are probably: (Don't know in which order)

FTL: Faster than Light (with Multiverse Mod)

The Elder Scrolls 5: Skyrim

A small multiplayer game called "Red Crucible 2" (browser based FPS game that runs in Unity Plugin, game's now dead)

GTA V

GTA IV

Note: I don't have the times on these games because I might or might not have "downloaded" some of them outside of official stores... so its just based on how vividly I remember them.

Pokemon Firered. One of my favorite childhood game.

Overall i've spent countless hours in minecraft and csgo for a close second

Recently tho I've been playing a lot of bloons and risk of rain 2. They're both really addictive

I don't know how much time I've spent in Minecraft, but it's probably over 1000 hours.

Second place certainly goes to LoL. They reset the statistics at some point but my guess is also close to 1000 (at some point I had like 700 and kept playing for a while).

I don't play either of those anymore though.

Either skyrim or oblivion. probably Oblivion. It's the most immersive game world I've encountered. Emminently replayable.

Easily 10k hours throughout the Diablo series.

Over 750 hours in Total War: Warhammer II.

Probably 2,000 or so in Guild Wars 2.

Gtav on ps3 was a blast.

My sister has more than 1000+ h in Sims 4

~800 hours into PAYDAY 2

~1800 hours in various sim racing games, assetto corsa, project cars 2, dirt rally/DR2, rFactor2.

And some ~300 hours in Stationeers

I have 1000+ hours in Forza Horizon 4 & 5, mainly due to weekly FOMO (new car every Thursday).

Haven't checked in a while but I think my personal record is 1400+ hrs in Europa Universalis IV.

totally accurate battle simulator, i have a really strong morbid fascination ngl

World of warcraft. Still true. I only played up through Crusade even. But it ate literally dozens of days of my life. I wouldn't say I regret that, as it was a learning experience for me. But I would definitely not have played wow if I could go back.

Continuum. I have more than 10 thousand hours on my main account, 3 thousand more on alts I do not have access anymore. Most of the time was afk or just being online since it had a chat and very lightweight. You can see top players by usage time on the trenchwars server website.

Microsoft flight simulator thanks to slow internet and 200gb updates every time I play.

Stellaris almost 600 hours and Cities Skylines, around 400 h. Damn!

That would be Elden Ring. Spent 200+ hours on that game (might sound like rookie numbers but that was my first open world game, was just a casual gamer before that).

hotline Miami, katana zero, ultra kill.

Crudader Kings 2 at 1400 hours and Total War Warhammer II and I at 800 hours

Minecraft. 2.5 kilo hours

Diablo 2 from launch, I won't even guess the hours because it's over 10k easy and that's just not good. Path of Exile says 4k+ hours as well. I'm an old fart though.

AI (Alien Isolation)

Dunno if counts as a game really.. But about 4k hrs of VRChat - love the place and the friends I made there!

DS1 to DS3, I lost count of the hours.

Nioh 2. The more you play it, the more there is to do