Generally speaking, few games 'defeat' me. If I stop playing, it is because I'm not having fun, and the point of games is not to have a unpaid second job.
Still, there are some games I've stopped playing without finishing.
Dark Messiah of Might and Magic: Elements: Clunky subtitle: The game was a game that was in theory quite fun. Theory. You can choose three standard classes (wiz/ass/fig), but the game has only one linear path for each as you level up, so that takes away from char. customization and replay value. I played a wizard and half the spells were useless or clunky as all fuck to use, and the combat in general was a mess of sub-par controls, a bad engine and half-baked ideas. And the story and characters, by Vishnu, I have rarely seen generic fantasy THIS uninspired, that's all I'll say. Also, big elaborate set pieces here and there just fall flat to me. I could've kept struggling through the game (albeit it does pull a bioshock and double each grunt's health at around the halfway point. Sigh), but I wasn't having fun.
Enchanted arms, despite being a JRPG, has much of the same problems as DMMM:E, in that it's a fantasy story that just does a straight rip from the trope book of its region of game development and has a theoretically kinda cool battle system, which ultimately falls flat. Also, it is grindy as all hell, and the story drags on needlessly and the characters are somewhere between 'empty cipher' and 'anime stereotype unaltered'. Again, could've powered on, but I didn't want to. I wasn't interested in the characters or story, or even beating up satanic robots.
Borderlands made the implausible possible - fucking up shooting guys in the face. Aside from being a unremarkable FPSRPGOMFGWTFBBQ, it works on MMO logic (I.E. "hey, I'll shoot this guy in the head from behind, point blank, with a incendiary shotgun, that's bound to kill hi-...HE SURVIVED? JUST 'CAUSE HE'S TWO LEVELS ABOVE ME?? Aaand now he's torn through my shield as if it were tissue paper, nevermind the absurd amount of money I invested in it.") Plus a dull story and repetitive combat. I *could* have grinded to godly levels, but it'd just be a boring timesink.
Dark Souls I purchased like, 8-9 months ago, then had to put it down to focus on studies. I need to get back to it, although it is kind of a fucking timesink, what with the constantly being slaughtered and whatnot. Still hasn't 'defeated' me tho.
Planescape: Torment was unique in that only the gameplay deterred me from enjoying it. Like, the isometric perspective (Never liked it, could barely bear with it in Baldur's Gate), which made several quests confusing, as was navigating the city. That's what made me walk away. I guess I could've powered on, but I wasn't having fun, so...eh.
Silent Hill 2/MGS (I have similar things to say about them) I actually thought was interesting, but dragged on a bit, and I'd really have liked to just get on with it. Still, good game which I need to pick back up some time.
Dead Rising 2 has a uninteresting plot, barely-there characters and annoying escort quests and one biiig timer for when the game is over and several smaller ones for each quest. Unless you're either the god-king of space or doing the quest(s) again after restarting the story or doing a second playthrough, you will not reach them all in time, and maybe not even then. And the zombie-killing is good, but hampered by your support character yelling in your ear or more quests appearing. And the boss encounters. Sheeesh. To paraphrase yahtzee (horribly): "Boss battles which on the first playthrough are about as fair as a man with nitroglycerine injections in his buttocks entering an asskicking-contest". They have insane amounts of HP (one took about 30 hits from the defiler before going down, while swiftly pouncing me and stabbing me to 1 health square regularily, with little way to defend against the fucker. Also, inter-toilet stall teleporting, dafuq.
I want to love DR2, but it's giving me a headache with all its stupid shit. But hey, it's capcom, I guess this is to be expected.
C&C RA3 XBOX360. What is there to say, except "Console RTS? LOLNOPE". So that's more of a dumb impulse buy hampered by system limitations.
AssCreedBro is currently infuriating me with invisible walls and ridiculous 100% sync challenges, and I *almost* feel like playing a bit of FO3 instead, but again, to quote yahtzee "This shit will not beat me". Plus, it does have enjoyable aspects I s'pose, but it's not much different to AssCreed 2, except...Hm...I'm lacking words right now.
So...Am I making sense? Doing like an Egyptian fish and living in De Nile? Do let me know.