Of the top of my head:
-Ace Combat 5 and 0
-The big Zelda Titles I've missed(Majoras Mask, Twlight Princess, Wind Waker, BOTW, and I'll toss on Hyrule Warriors: Age of Calamity as well). I'm almost done with the Links Awakening remake for the switch. Skyward Sword I'm gonna pass on because it's apparently not that good and, more importantly, it's a Wii Exclusive(and I'm not picking up a Wii just for it).
-God of War(the Norse One).
-Finish Hades
-Finish Pyre
-Finish Hyper Light Drifter
-Finish Salty Sanctuary if Elden Ring isn't out by Summer, otherwise just play Elden Ring.
-Maybe finish Octopath Traveler.
My "In Progress" games pile is pretty big, let's put it that way. I try to finish the games I start or outright abandon them but occasionally I stop playing a game, say "I'll put this aside and pick it up in a week or so after I've played something else for a bit" and then it's 3 years later and that game is still half complete and I haven't touched it but kinda want to finish it still.
Of course, if Silksong comes out I'll finish up whatever I'm playing ATM and bump Silksong to the top of my list.
Replay Undertale. I meant to do that 2 years ago but I got distracted, I really mean to do it this year, you guys. Then I can finally look through the art book I got and listen to Asgore's theme again.
Deltarune is also worth a play if you want something to follow it up with. The downside it's apparently Chapter 1 of ? and there's no timeline for when the rest will be forthcoming, but still worth experiencing regardless.
Play through Nier Automata, actually all scenarios. I always drop the game after the first one. It's not that I hate it or anything, I actually quite like the game but for some reason this always happens. But I really want to commit to it now that Nier Replicant is on the horizon.
Most of the scenarios are basically just non-standard game overs you can achieve with a small time investment. Only Routes A, B and C/D take any appreciable amount of time and effort(C/D are almost overlapping with each other. You finish one, you can almost immediately finish the other right afterwards). I think there's like one notable exception where you need to do some extra work and fight a bonus boss battle to achieve it.
Play all 50+ games on my backlog to completion, buy a PS5 and play all the games I missed on PS4 as well as anything good on PS5, and maybe buy a Switch too if I've got a couple days to spare. Also I'm going to eat Chichester Cathedral.
I've heard Cathedrals taste Sacrilicious.