Full list of all 20 oOo: Ascension achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox One.
Completed Sector Gamma
Travelled 50 Miles
Completed Sector Beta
Died 100 Times
Attained Triple 'O' rating On All Levels In A Sector
Completed Sector Alpha
Died 20 Times
Attained Tiple 'O' Rating on One Level
Travelled 1 Mile
Died Once
Complete Sector Delta
Complete Sector Epsilon
Complete Sector Zeta
Complete Sector Eta
Complete Sector Theta
Complete Sector Iota
Ascend
Die 1000 Times
Attain Triple 'O' rating On All Levels
Travel 250 Miles