Here is the full list of all 17 Spectrum achievements.
You've completed chapter 02!
You've completed chapter 01 perfectly!
You've completed chapter 01!
You've completed chapter 01 level 01!
You've completed chapter 03!
You've completed chapter 04!
You've completed chapter -01!
You've completed chapter -02!
You've completed chapter -03!
You've completed chapter -04!
You've completed chapter 02 perfectly!
You've completed chapter 03 perfectly!
You've completed chapter 04 perfectly!
You've completed chapter -01 perfectly!
You've completed chapter -02 perfectly!
You've completed chapter -03 perfectly!
You've completed chapter -04 perfectly!