Here is the full list of all 14 ROTA achievements.
Finish in under an hour
Collect 50 Clocks
Collect your first Clock
Collect 50 gems
Discover snowy night
Discover desert night
Discover cobblestone day
Discover grassy night
Discover snow
Discover desert
Discover cobblestone
Clear the First Loop in "Wrap It Up"
Collect your first Gem
Discover grass