Here is the full list of all 22 Remnants of Naezith achievements.
Customize your appearance
Play a Custom Level
Inspect a top player
Find all the secrets
Speedrun all the chapters
Complete all the chapters
Speedrun the Crystal chapter
Speedrun the Metal chapter
Speedrun the Sand chapter
Speedrun the Jade chapter
Complete the Crystal chapter
Master the Crystal chapter
Master all the chapters
Master the Metal chapter
Complete the Metal chapter
Complete the Sand chapter
Master the Sand chapter
Find a secret
Watch a replay
Master the Jade chapter
Complete the Jade chapter
Improve your time