i find it hard to get some Achievements.

i ate 3 rats and my bun ate 1, but both Achievements have the o still not black or marked as done.

am i missing something?

i have 12 Achievements doing this.

hmmm, sounds like a fuckup. The achievement system is a bloody mess and stuff gets broken too often. I'll add it to the debug list.

I find the difference between the dot being empty or filled in depends on if a species has a royalty, rats for example don't and so their dot is empty

Ohhhh, I didn't get that was what they meant. Yes, dot filled/empty is for if that species gives you achievement points to spend.

then i have 31 Achievements in all (empty and filled dots), but the rewards unlocked at 20 achievements is still locked

the reward is unlocked at 20 points and points only come from achievements with filled dots, you should be 1 off if you have 31 achievements with 12 being empty dots

ok. it just says 'rewards unlocked at 20 achievements' and says nothing about the dots, so it's easy to miss that.