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