Here is the full list of all 26 Rogue Singularity achievements.
Complete World 1
Complete World 2
Complete World 3
Complete World 4
Complete the game
Unlock a level skip
Unlock all level skips
Complete all secret zones
Finish the game and all secret levels in a single playthrough
Complete a daily challenge
Complete a Chaos Lab challenge
Enter the black hole
Reach the edge of the Black Hole
Unlock full death outfit
Unlock all outfits in the game
Unlock all abilities
Unlock all items
Unlock an outfit from a code
Use a seed to generate a level
Die to a coconut
Celebrate defeating the rock boss with fireworks
Race against a ghost
Ground pound into the void
Finish the game without losing a life
Finish the game without using ANY items
Complete a level in under 20 seconds