1056h in Team Fortress 2, which is the highest I can verify at least. I'm sure I've put more time in Sims 4 over the decade but with multiple installs of pirated copies I have no way to verify that lol

About 1200 hours in Destiny 2. My wife and I have about 2000 hours combined in Destiny 2.

I'm afraid to find out how much time I've spent playing League of Legends. Unfortunately the Time Wasted On website only goes back so far, so my stats aren't accurate.

This is actually a good question if I'm answering it entirely based on feels, not actual data.

Biggest game overall, single player plus multiplayer? Halo series. Maybe Destiny 1&2 too.
Biggest PC game? Probably Neverwinter Nights (2002). (This predated Steam, so fuck the statistics anyway.)
Biggest game I'm spending shitloads of time right now? TRAIN SIM WORLD 3.

According to Steam:

Monster Hunter Rise, 754 hours

Back 4 Blood, 616 hours

Monster Hunter: World, 581 hours

Cyberpunk 2077, 470 hours

Hitman 3, 288 hours

Please send help.

Various versions of The Binding Of Isaac

I have so many thousands of hours of rocket league across so many platforms at this point.

Worst part about transferring from console to PC was all my playtime data being lost.

Honestly? Skyrim. Played it a few times on different platforms. Different builds, different experiences.

Elder Scrolls Online, by far

Team Fortress 2. About 3000 hours and I haven't played it in years, I was addicted.

Deep Rock Galactic at around 300h

Binding of Isaac, over 1170 hrs.

Have I seen everything or am I any good at it? Hell no.

I must say, there are a surprising amount of factorio players on this threat, glad to see that!

Rimworld, KSP1, Stellaris

Easily Rocket League. I think I’m somewhere around 2,000 hours at the moment.

ooh, astroneer is great! haven't played it myself but seen some gameplay of it. mine is Planetside 2 with about 2400 hours... most of that is from the past two years I'd say

No Man's Sky. I think I'm around 800 hours on that one

War Thunder. Well over 2000 hours across two platforms. I regret every minute and every penny spent.

FFXIV with over 5k hours.

Hard to say, I've been on an OpenTTD (since Transport Tycoon), Dwarf Fortress (since .31), Minecraft (since Tekkit) and Factorio (since .11) loop for several decades now, with 1000s of hours in each. I tend to play one at a time, currently doing Enigmatica 6 Expert.

Kind of difficult since aside steam I have no clue on how many hours I have spent, especially for console games.

That aside, my most played game in steam are:

• melvor idle with 1500 hours (it's an idle to be fair, kind of runescape but it's only a UI, you leave it open farming)
• factorio at 700 hours (the entirety of the factory building genre is pure crack)
• risk of rain 2 at 400 hours (it's the perfect sequel and a damn fun roguelike where you stack items until your pc breaks)

According to Steam, Arma 3. But I know for a fact that a lot of those hours were not technically in game because I would spent hours upon hours in Notepad++ scripting for my modules while I had the in-game editor running in the background to alt-tab in an test things every now and then.

TF2 is second, and that's all actual play time, baby.

However, in Ultima Online I spent a good 8+ hours a day, every day, from 1997 to 2003. So probably that; I just have no actual counter for the time put in.

Stellaris

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.

Minecraft Factorio EVE: Online Cs:go LoL

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...

CS:GO 5000+ hours wasted in my 20s

Tabletop Simulator. In 2020 my weekly gaming group couldn’t meet anymore, until we discovered that solution. We still meet in person occasionally but we have been playing every week online. I’m genuinely not sure how I would have gotten through the lockdowns without it.

Idle Wizard 6k+ hours

NGU Idle nearly 4k hours

MHR Sunbreak 1k+ hours

BattleTech 1k+ hours

MH World 800 hours

Those idle games running in the BG sure racked up the hours. Ran them for more than half a year before I realized I was just wasting power for something senseless.

Risk of Rain 2, man. My absolute favorite game of all time.

What, recently?

Historically, Destiny or Borderlands, probably the latter. But lately, I'm spending all of my time in Factorio.

I haven't looked at the hours stat; it'd probably only depress me.

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.