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