What game have you played for the longest amount of time?

Mine (I'm putting three):

Black Ops 2 - 15 days: 9 days for multiplayer, 6 days for zombies (zombies is an estimate, i might have put even more time into zombies than multiplayer)

Modern Warfare 2 - Unknown, lower than Black Ops 2

Grand Theft Auto V - 8 days

EDIT: Pokemon (no specific version) - Played it so many times I have no estimation for how many days I put into it, whether it's ruby, sapphire, emerald, fire red, leaf green, or heart gold I can't even make an estimate for how many days I put into Pokemon.

On record, I think its Cod Mw2 which is 1200 hours

Off record, probably C&C ZH and Sc2

Around 90 hours on Wind Waker HD. I'm not usually one to replay games over and over, unless they're online-centric (MK8 and SSBU will be much higher at the end of the gen).

I remember one of the cods I had like 20 days on the online, I can't remember if it was WaW or MW2.

yeah i played the last of us five times (and counting) and i've never done that before

Counterstrike: from 1999 to present. Probably over 3,000 hours.

1) Grand Theft Auto V - 1300 hours
2) Test Drive Unlimited 2 - 700 hours
3) Grand Theft Auto: San Andreas - 450 hours

I played TLOU twice. I 100%ed WWHD twice, which is the absolute most I've ever done for a single player game. That damn figurine showcase took forever. And I still intend on playing it on Hero Mode.

Nearly 1500 hours in Team Fortress 2.

I rarely touch it these days.

i think i made a thread about never playing zelda, and if i'm not mistaken, didn't you say you're fairly new to zelda? if so, you must be a big fan already if you played that much zelda.