Games you ALMOST completed

Played The Witness since my birthday last last year, but still haven't 100%'d it. At least I've reached the endgame.
Those puzzles lying around are really hard to find

I think I also haven't finished Chrono Trigger because I got bored of grinding EXP (for Lavos), then I lost my save. I ended up reading the wiki which made things worse bc I saw how there are 'multiple endings' xD

I'm not that sure about this but I think I haven't finished ANY Zelda games.
Minish Cap - This one, I don't know if I did finish this but I specifically remember gambling for those figurines
Link to the Past - Reached mirror world then lost my save GBA. I did try getting ending using out of bounds (SNES), does that count?
Ocarina of Time - Cheated my way halfway in the game (checking cheats in PJ64 was a bad idea), then got bored. Might play this again someday and actually finish it
Majora's Mask - Reached the last dungeon then school happened, then lost my save

Dark souls II last dlc. couldn't kill one boss and then stopped playing
Hand of fate - last boss. couldn't kill him few times and quit too
Dying light. - maybe 97% completed

final fantasy XIII, on xbox 360 yeeeeears ago. Reason now I'm trying to finish it on pc :P

Silver Surfer

Teslagrad. I just couldn't beat the final boss.

I found Limbo's last bit difficult too. But completed it after watching a youtube walkthrough

Brütal Legend, I simply couldn't beat the final boss. Same thing happened to me with the second campaign on Costume Quest (the winter themed one), the last boss was insane. Actually now that I think about it I believe I've never managed to properly finish any Double Fine game, huh, weird.
Sonic Adventure 2, Electronic Super Joy Groove City, Glare. Stuck right at the end of all of those.
Also, as a kid I never got through 8-4 in Super Mario Bros, I almost always died at 8-3 and never revisited the game after the 90's so I still haven't beaten it.

Doom 2. Got one hit on the secret Romero but trying to get 3 was too tedious.

The only game I can think of that made me quit on the final boss is Pocket Zaurus on the NES. It's like Bubble Bobble (multi) and Haunting (Genesis) in that the final boss is unlike anything else in the game, so you're completely unprepared, and what you have to do is ridiculous.

Kingdom Hearts II. Wanted to 100% for the full ending, but couldn't get two of the needed items to drop after literally hours of farming for them. Figured I'd get back to 'em later, and that was . . . jeez, at least ten years ago.

Splinter Cell was more recent, as I got into it way late. Got up to the second-to-last mission, I'm pretty sure, and the difficulty was starting to get to me. Again, set it down to take a break and just haven't picked it back up again.

And Yet It Moves - i think ive reached final stage or at least final moments of the game

https://www.gog.com/game/ad_2044 - also final riddles, but couldnt find the right pixel for one of the riddles

Hotline Miami. Last boss was tough, and I thought I'll have some rest before getting to it again... and still haven't continued. Now I probably would have to start from the beginning, as I don't remember how to play already.

Grand Turismo 1997. PS.
That was nightmare... Im not fan of cars-sim, but thaat was the onlly one disk for my PS... and i try and suffer many times...

Euro Truck Simulator 2 - they just keep adding achivements.)

I almost finished Huntsman: The Orphanage back when I got it. Then one day I accidentally clicked "New Game" instead of "Continue" and lost all the progress because of course that happened.
Needless to say, the game wasn't very good so I never played through it again.

Final Fantasy VII - lost my save file right before the final boss.
Harvest Moon: Back to Nature: lost my save file on the 4th year (the last year before considering the game beat).
Resident Evil: Dead Aim - the final boss was a real pain in the ass.
Alex Kidd in the Miracle World - the last stage was a pain in the ass.
Rune Factory 4 - ridiculous grinding required in order to proceed to the final arc.
Bravely Default - stopped at the Dark Knight fight, never returned to the game since then.
Cave Story - I beat it with the normal ending, but there's a difficulty spike before the final boss in the true ending route.