I'm playing on the GOTY edition, most achievements are fine but some like the 'Shrieker' and 'Woodland Spirit' contracts have not unlocked for me despite me killing both monsters.

I actually saved right before I finished the woodland quest to test this out, went back and completed it again using that save, still no achievement.

I know achievements aren't a big deal but it's something I enjoy collecting, anyone have this problem too?

I got the same problem with "Woodland Spirit" achievement. I tried to do this quest many times in different ways and the achievement is still locked. Please, fix it.

One year later and these two still don't work for me.