Horizon Forbidden West; I went on holiday just before the final mission and when I went to pick it back up, I discovered that my controller was fucked. Now I'm waiting for the PC remaster because, I still find using a controller slightly unnatural.

Dungeon Master. I refuse to use a guide, so even though I've been playing it for almost 25 years, I still haven't finished it. Always run out of food...

Risk of Rain 2 for me. I’ve “finished” the final boss but there’s so much more to unlock and do in that game that I’m not sure I’ll ever be done with it. Absolute blast to play with friends especially when you get those miracle runs where you get all the items that are amazing for your respective classes!

Probably Skyrim because I haven't finished Dark Brotherhood yet, the last major vanilla faction questline remaining

Factorio with the space exploration mod.

For me I think it is more for JRPG genre games as growing older makes me unable to access them easily as I was younger due to time constraint, somehow I am more appreciate shorter game because I can finish them faster.

This reminds me of my Final Fantasy XII International Zodiac Job System that I had on PS2, lost track where I was progressing and not really want to finish it as I felt the world is large enough with some hidden optional bosses. Another instance of unfinished playthrough is my SMT: Strange Journey because I had lost my track due to irl stuff while the save had 80hr on the clock.

Another series that I would not finish is Harvest Moon/Story of Season, had Back to Nature and A Wonderful Life on PS2 back then (and now on steam), could not complete them as it feels more like a chore. First year is enough for me to mark it as complete.

Payday 2 too with thousands of achievements that I did not bother to collect, I just played them for fun and with friends.

Gta V will probably only be truly "finished" for me when gta 6 comes out (assuming that it's going to be as good of a game). 10 years later I still keep finding new stuff in it. I really hope 6 can live up to it.

Rust I guess? TF2? Anything multiplayer I had fun with people I know in. I can't start single player games anymore and put too much in unless I know it will go somewhere otherwise they kinda... get dropped.

Underrail. I love the game so much but every time I hit the level cap I just lose interest completely. Doesn't help that the guy developing it is violently opposed to modding.

A mod, not a game, but Terrafirmacraft.

I deeply love every part of it, except the ore prospecting system. I always use commands to find my first copper vein because I find it so grindy otherwise. Doesn’t help that the vast majority of TFC’s progression is locked behind copper.

So I guess technically I’ll probably never complete the game legit.

Probably shiren the wanderer, it's a pure roguelite so you can't brute force it like the more forgiving roguelites with permanent upgrades, but I only play in short bursts and always forget stuff when I finally play again.

I got into no man's sky late after a bunch of updates. I've got too much cool stuff to start over.

Dead Estate. It's hard to 100 percent it