Behold the entire list of games I own but have never completed!
[GBA]
Columns Crown (can you complete Columns? certainly not this horrid dull version anyway.)
* Denki Blocks (This gets fiendish towards the end)
* Final Fantasy Tactics Advance (It's monster repetative, I lost my way...)
* Golden Sun 2: The Lost Age (One of my newest games, lost steam early.)
* Super Mario Advance 3: Yoshi's Island (goddamn you last boss that I can't wrap my head around!)
[Master System II]
Cool Spot (Or perhaps it's been so long and I really did complete it?)
[Mega Drive II]
* Dynamite Headdy (Actually, I completed this using an Emulator and Save-States, but I'm confident that you have to be some kind of Ninja to complete it properly).
Mega Bomberman (Nasty last level :O )
Theme Park (I'm dubious as to whether you can "complete" it. Nevertheless, tedious and repeatative.)
X-Men 2 (This game was too freaking hard for me. Plus it's not like I like the X-Men anyway
)
[PC]
Age of Empires (Repeatative, Tedious).
Black & White (The most needlessly over-hyped game in existance. There are some great things to do, but actually playing and completing this game is extremely hard because... well, it's utter shite.)
Blade Runner (crappy game bundled with my DVD drive 8 years ago)
Civilization II (Can you "complete" this game anyway?)
Doom III: Resurrection of Evil (What kind of person completes Doom III and goes back for more? I must be a masochist).
Incoming: Subversion (obscure expansion to Graphics Card shifting game with a showstopping bug that ensured it was incompleteable)
* Settlers II - Gold Edition, The (Couldn't work with the last mission. The reds attacked you, and you couldn't retaliate unless you wanted the Yellows to attack you as well!)
Theme Hospital (I got just about far enough to see all it had to offer though)
* Thief: The Dark Project (2nd level.)
* Thief II: The Metal Age (About 3/4s through)
* Thief III: Deadly Shadows (2nd level. I like the Thief games, but something just stops me from playing for all that long. Usually my instinct to cut nasty people into chunks.)
[PS1]
Final Fantasy Origins (1 and 2) (Nostalgia is no fun when you weren't there in the first place)
* Final Fantasy Anthology (European Edition - 4 and 5) (I'm quite near the end on these, but I stalled on completing them because I wanted to be a high enough level to beat everything - and can't be bothered to level up!)
* Final Fantasy VI (6) (I love this game but don't even know where to start now I have the airship again! blinded by too many sidequests
)
Metal Gear Solid: Special Missions (anyone who completes this has too much time on their hands)
* SaGa Frontier 2 (Think I got stuck doing too many sidequests. Or dying. I liked this game loads though
)
* Threads of Fate (Not sure why I haven't completed Mint's quest yet. It's a fun little game, I guess I just got tired of disc-swapping
)
* Vagrant Story (awesome game, I probably got stuck somewhere though
)
[PS2]
Kingdom Hearts (I either got bored with the game itself, or got my classic case of "I want to do all this but, I can't be bothered so i'm going to quit and wait until I can be")
Grandia II (Horrid, horrid game.)
* Metal Gear Soild 3: Snake Eater (Great game, I just ran out of time for games recently)
For the record though, I have still completed an impressive number of games that were worth completing. I'm going to star every game on this list I would like to one day complete because they're worth doing it