I'd say Final Fantasy XIV, around 4000 hours

Diablo 2, mostly back in the early days, but resurrected is still fun

MF sorc and Uber killer pally ftw

XCOM 2

Guild Wars 2 by far, 10k hours. Followed by Wow and Civ 5.

1. Doom I and II with who knows how many hours since Christmas 1996.

2. Minecraft since 2011.

3. Binding of Issac with close to 1k hours.

4. Factorio with 850+ hours and currently rising.

CounterStrike. Haven’t played in years but there was a while when it consumed my free time.

DS1 to DS3, I lost count of the hours.

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

4000 in arms 3 1000 in TF2 Around 2000 in osrs

Jesus Christ, didn't realise it was that bad. I just wish I was any good at any of them

Acorn Revs. can't tell you the hours, thousands would be my guess. Elite: not quite as many hours. Discovered the save file format.

Got around 300+ hours into Borderlands 2 and around 600+ into Warframe

War Thunder, approaching 10,000 hours. One day I'll get good!

I'm at around 1750 hours playing The Binding of Isaac and I'm not done with the game......

Hollow knight ~110h

Terraria and Path of Exile

Near enough 3000 hours on destiny 2 and g-mod in second with 992 hours. And third is advanced warfare multiplayer woth 699

Planetside 2

10 years and counting

Starport GE

15 years and counting

I racked up about 9000 hours in WoW before quitting, bit over 3000 hours in Runescape.

On steam it's dota 2 with about 3k hours but really my most played game is the old f2p Combat Arms. I nearly exclusively played that game after school to bed for like 4 years, I probably had over 6000 hours logged. Still talk with the friends I made there a decade later.

Swtor

Team Fortress 2 with over 1,200 hours. I've been playing it regularly for over a decade, so the hours have added up

Grim Dawn with 800+ hours. Slay the spire is 2nd with 600+ hours

Life.

9 months until your game finally goes beyond loading screen. You pay it permanently and cannot stop playing it - and if you intentionally stop playing, you can't play again. No savestates - which sucks for exploring alternatives. You also don't get asked whether you want to play or not as well - you just get thrown in. Also there is no character selection screen and you start with whatever stats, region, context, etc. you rolled.

However, it is definitely quite interesting and gives you really very realistic experiences. Did I mention, that it's much better in its immersion than all the AR/VR stuff and co? You even can properly smell and taste stuff there!

Pokemon Emerald

On Steam my top game is GTA V with like 1.1k hours, I haven't played it in over 2 years tho.

But the actual top game is probably Minecraft, tho it's hard to get an exact number.

Chose to live the DINK life, loving it.

Ark: Survival Evolved. I'm at just under 1000 hours, and Rocksmith 2014 I'm at 466 hrs.

GTA series in general, and GTA V in particular.

I'm at like 900 hours in Core Keeper

Soul Sacrifice

Top 3:

1. Minecraft - Probably over 1000 hrs
2. Stardew Valley - 491 hrs
3. Sims 3 - 425 hrs