Full list of all 12 Lucidity achievements worth 200 gamerscore.
Beat the first level of the game.
Finish the first Act of the game
Finish the second Act of the game
Finish the third Act of the game
Collect 100 Fireflies
Collect 500 fireflies
Collect 1000 fireflies
Collect 1500 fireflies
Collect all the fireflies in 'Every Kite Soars' in a single run
Beat 'Deep Sleep Dive' without collecting any fireflies
Complete all Bonus Levels
Beat 'All Around is Petrified' without taking any damage