Here is the full list of all 19 GoNNER achievements.
Did you just run out of colors?
I believe in you, get back up.
These combos are just getting ridiculous...
There's nothing there! No easter egg, no extra item, no nothing. Just a dumb achievement.
you found sally
I'm a serious adult person and I think this kind of humor is childish and should be banned.
Didn't have to skip death.
You became Death.
You completed Death world! Woah!
You completed Shooty world! Smooth!
You jumped on 20 enemies in a row
You completed the Cave world. Good job.
You got a combo of 15!
You got a combo of 5
It's not even ASCII, how can it even be called Roguelike???
You picked up a glyph!
You completed the Robot world. Impressive.
You hit the glyph cap!
You pushed that big piece of trash off your lawn. Good on you.