How long does it usually take you to give up on a game?

tldr: I stop if it gets boring or tedious
with some games they were good but I had to stop due to work or losing a computer and need to retake from the start after a few years.
Afterfall insanity xe i never managed to boot up
some of the newer games like skyrim or the latest batman will have to wait for a faster rig.
I've got about 18 in my crap list, [right click/Set Categories/crap] for various reasons
also have folders for early access [putting off till they are done] and multiplayer games [putting off till later, high chance they are grindy or p2w]
I consider a game done if I've completed the story line and explored as much as I can; however if it's a auto checkpoint save only game I am not going to replay the game to get something trivial I missed, I'm not into speed runs, I don't go for tedious achievements.

to expand .on the crap list I gave up on: the left for dead games were geared for multiplayer with waves of spawned enemies. Starship traveler I beat a few times but it wasn't worth going through again and again for a variant paragraph here and there. "No time to explain" I liked the flash version better.Surgeon simulator I played around with but I wasn't any good at. Bird assassin just boring, liked the flash game with the zombie chocolate bunnies better. BEEP, Capsized, and Cargo commander were too level based, i prefer metroidvanias where you explore and upgrade. hotline miami and i think 7.62 high caliber putting off due to high difficulty; Chains, Osmos, and Mcpixel just tedious. The Desolate Hope too timer based, Seduce Me the Otome, I just have trouble paying attention to the story in games presented that way with little real gameplay, content would be better placed in a book where you don't have to click for every sentence or worry about double clicking past something.

Hmmm, it's rare I make a decision to stop playing something before seeing the ending... Usually I'm just taking a break, and expecting to load that save file in a few hours, or tomorrow, or on the weekend... :)

Of course, later I look back and realise I've probably quit... Even then, though, I try to keep it installed just in case I give it another try... Doesn't happen often, but keep hope alive... :)

Well... Usualy i giving up on games that stop being fun at some point. But i do like to complete what i started. Yes.

i'll vote for dan quayle because my reasons aren't in the poll.

i give up when i get bored, when i die a lot, something annoys me and i'm not enjoying it.
game time is irrelevant. :3

I've played XCom:EU and EW, each took around 40 hours, and enjoyed both playthroughs very much.

On the other hand, I've played with (let's say for example) LA Noire for 3-4 hours and never touched it again.

I say it all depends on how entertaining the game is, no clear answer, it's different all the time.