Single player games in your Steam library that you're not able to finish

I haven't managed to finish the main story of Fallout New Vegas yet despite 81 hours spent playing it! I think I got trapped in one of the DLCs part way through and never returned to complete it...

Just Cause - Last stage (the fact that you have to travel so frigging far away just to even get to the action frustrated me)

Thief - Got bored somewhere in the middle

Aero's Quest - Mediocre platform game. There are 100 levels, in each you have some traps waiting for you and in each level you basically have to push all the buttons on the ground and reach the end of the map. It's not bad but it's not good either. It's easy to die, controls could have been better and there are some bugs present in the game.

Fotonica - First person runner type of game. It's pretty nice but nothing really special. Good to play for 15 minutes between some more serious games.

I've never finished any campaign in Total War: Attila as I find that it gets boring around mid-game. The same for Total War Rome II although it is a bit better (only finished Ceasar in Gaul once as the Nervii).

I also never finished Just Cause 2. Even though it is a great idea, the missions are way too repetitive and the world is too big (yes, I said too big). The world is just way too empty.

Most Assassin's Creed games I never finished, even though they are really fun, I just get bored with them at a certain point (only finished Black Flag and Unity).

Force Unleashed because lousy presentation at the Star Destroyer part. The game was semi-silly, but I LOVED it. But that I've spent 45 minutes with a bossfight with max HP (!!) because they didn't fix the indicators in the "ultimate sith edition" that's beyond bad development.
Cthulhu Saves the World because it got boring :( Maybe I'll give another try for another JRPG that's ending not so clear. I don't like games when you know how it will end, because it robs away the joy from me.

As much as I hate to say it but all of them XD
I think out of all the games I have on STEAM, i've only completed South Park, Fallout New Vegas and all the Sakura games xD.

Super Meat Boy

Hidden Mysteries: Civil War - Hidden object game of those old and tideous kind with low resolution. I'm a fan of the genre so I gave it a shot though. However, it's impossible to finish the game. In the fourth chapter in the forest it's impossible to pick up one item - kerosene lamp. No matter how many times I clicked on it the game just wouldn't pick it up. And I know it's the right item cause even hints tell me so. I would finish it, I was pretty much at the end of the game but this game breaking bug makes it impossible to finish. This is inexcusable to put games with such bugs on Steam.

Ferrum's Secrets: Where Is Grandpa? - It's a 3D hidden object game. I played for a few minutes but noticed it's of very low quality. Normally I finish even bad HO games but I somehow don't feel like playing this one any longer. Maybe I'll come back to it some other time, I don't know. It just feels very amateur-ish. On top of that I set the game to English language but a lot of texts appear in Polish, it's ridiculous. Another annoyance is that in-game music is very, very quiet and it's impossible to change the volume of anything in this game. Meh.

Dead Island=Too repetative
Medievak:Total war: Great, but not my taste

Fly'n.

i Didn't finished Darksiders or Mark of the Ninja u. u i might do it someday

I have a bunch but the most recent is Remember Me, because I absolutely HATE the protagonist and now playing it feels more a duty than a pleasure. I hate when that happens.

Alan Wake, was really excited when it came to Steam, but found it very repetitive. Couldn't finish.
Also Afterfall Insanity. It was clunky, but I was actually enjoying it. Got to a scene where you have to run away to escape this mutant ogre guy. At the end of the run, I arrive at an alley where I have to kill him. It's bugged and my gun won't fire. I can't melee my way out of it, so after about 50 attempts and a lot of screaming, I gave up.

I'm super anxious, so one day I play some, and others I play another ... basically, almost all my backlog is about 50% completed games xD

Binding of Isaac :(

insert list of really awesome games then claim their boring and rubbish....

am I doing it right?

Tcheco In The Castle Of Lucio - It's a retro platform game which has one crucial problem. You have 10 lives or so and after you lose them you have to start the game from the beginning. And it's very easy to die in this one. I probably won't play it any longer since I'm not a fan of "lose all lives, start from the beginning" type of gameplay. Also, the controls feel floaty (I'm thinking v-sync causes this, as always in platform games) and it's impossible to play the game in windowed mode because it doesn't have any options. Apparently someone in the game forums wrote something about some software that can run games in windowed mode but I don't feel like going through all that hassle to do it. The game should have had settings put in it.

Jones On Fire - This game can't be finished as it's a runner with grind elements. It's pretty cool and fun to play. I probably won't do 100% completion though as that would require hours of playtime and I don't think I want to play it so long.

Alter World - It's a 2D platform game in which you have to jump and change worlds in order to reach the exit. I rage quit after a few levels. Controls aren't that good and the game's not really great either. If you want better games similar to this one check Schein and Bliss.

Alice's Mom's Rescue - It's not a horrible game but not a good one either. Why? Well, it's very simple in terms of design and gameplay. You just collect gems (for no reason as you can't do anything with them) and jump on mushrooms which make you big or small. Aside from that you also collect keys which you use to open the gates. You have to omit enemies as you can't defeat them. That's it. Gets boring really fast but the main issue is that after a few levels the maps are getting bigger and very often you just get to a place where you can't go back and you have to start the whole level from the beginning. There's no map and there are no indications what is where so you have to be lucky and actually go the right places right away or keep dying every few minutes until you figure out where exactly you have to go first so you can finally complete the level. It's no fun, it's annoying and tideous.

Skyrim... sigh.... idk can get myself inmersed... it constantly reminds me its a game.. from its linear dungeons to its incredibly lazy quest design.

Shadow of Mordor, idk why i love the Batman combat and LOTR lore, its a mistery...

Assassin's Creed III - just 'cause AC over on Revelations for me
CoD Black Ops II - because I didn't like it
CoD Ghosts - only one word "crashes"
GTA IV - I don't like GTA
Lara Croft and the Guardian of the Light - I started to play another game
Metal Gear Rising Revengeance - boring
Penumbra (Black Plague/Overture/Requiem) - I just play it when I'm without internet connection
RE 6 - I stop play it 'cause my coop partner stop play it and I buy it only to do coop ;(
Sleeping Dogs - is a good game, but I needed space in Hard Drive
Trine 2 - I start to play and just stop (I don't know why)
X-Blades - pff isn't a good game

Alpha Runner - A small runner type of game. It's good to play for a few minutes but that's it.

Bard To The Future - A small platform game. The problem with this one is that it's very unpolished. You will die a lot further in the game because controls are not precise, because you have to be very precise while jumping and omitting obstacles (even if you touch the air around an axe, for example, you will die and if you jump on an enemy slightly to the left or right you will die as well) and the game has problems with Controller because often the character just keeps on going even if you let go of the "left" or "right" button. A platform game has to be very well done in order to be fun and not frustrating. This one fails to do so. Aside from that you just go from one end of a level to the next (and collect a map piece on some of them) and your only attack is to jump on enemies or to rush on them from behind. It's not a horrible game but definitely not a good one either. Also, why are all the achievements shown as "hidden"? Even those that are not story-related? Huh. Plus side? Humor, it's pretty fun when the dialogues appear.

Alien Rage - Unlimited. The game is so full of bugs and it also crashes from time to time. This is actually the first time that I can't finish a game because it literally won't let me.

Let me explain one of the bugs that bothers me the most: when I couldn't finish a certain segment of a level in my first try and then restarted from the checkpoint, the explosive barrels that you need to shoot are no longer where they should be (they just disappear). I believe it's not possible to get through the area without these barrels, because the enemies will kill you before you can kill them all. Sure, you can restart the whole level to get those barrels to be there again (as I found out after a visit to the forums, of course), but after a while this gets really really annoying. So... Uninstall ;)

pff lemme see.

Thief: Everytime and I mean it EVERYTIME I play it something needs my attention and then another game comes out and I need space to install it so I have to uninstall it, this happened 3 times by now.

Postal 3: Way too many bugs.