24 - 48 hour sessions were common for me back when Call of Duty: Ghosts was the game to play.

Xbox wrote Can't even remember all the countless hours I put into mw2 over a 6 year period or so. Plenty of all nighters all the way to the nighttime the next day. The good old days when all I had was time on my hands and not as many priorities.
Really miss playing that game. Would probably still be playing it to this day if it wasent flooded with modders and ass holes who just freeze your classes when you don't even say one word to them.

That game was amazing, I think I must've had like 80 days gameplay time on it. By far one of the best games ever made for multiplayer.

The first black ops double xp nuketown 24/7 i slept for around 5 hours over that weekend it was lit

i prestiged 8 times in that weekend rolling with the same 6 man team the whole time

12 Hours on good old Halo 3.

Played for like 14 hrs on mw2

Well, when COD4 was first released I played around 15+ hours every day for 3 years lmao, but my longest sesh without sleep or a break was 30 hours straight on Destiny 2. But yet again back in the COD days, I did do some stupid long hour seshes lol, I remember grinding COD4 for a week straight with about 10 hours sleep fml. Then I slept for 2 days straight after that week.

The longest game session I have ever had was 16 hours when their was double xp weekends on black ops 2.

Multiple 24+ hour sessions when playing cod4 and mw2 grinding for camos and looking for glitches.

Probably around 12-13 hours playing arma 3 haha

Man, back in the day it must of been like 13/14 hours easy.

Now I struggle with 3