I've got three achievements left, and I'd like to be able to submit my run when I'm done.

I don't think there's a way to reset your advancements, but if there is then yes I agree

there should be a file that's like "achievements-steam.dat" that you should be able to open with notepad. you can erase your achievements by deleting everything in it with notepad. however, you should probably keep a copy of it somewhere.

Given that there is an achievement for 200 fishing quests, I think this can safely be considered a meme category, and no more. I know of one completion on journey mode and it's around 10 hours long.

considering most runs would more than likely happen in journey mode i dont see this couldnt be a category

We are considering this but without the fishing achievements.

you should still have something separate including the fishing achievements, it sounds interesting outside of journey mode

200 fishing quests really doesn't sound interesting outside of journey mode, but I would like to see someone do it

i was gonna try it just to test my patience honestly

All Achievements is now on category extensions: https://www.speedrun.com/terraria_extensions#All_Achievements
Make sure to check the rules. Let me know if you have more questions.

no way