Full list of all 42 Hellpoint achievements worth 1,360 gamerscore. It takes around 30-35 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 32 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 360 Gamerscore.
Defeated the Archon Knight
Defeated the Archon Slaver
Defeated the Arisen Congregators
Defeated the Artillery
Defeated the Celestial Beast
Defeated the Consumer
Kept your data and defeated The Interface
Answered the challenge of Undisturbed Defas Nemundis
Answered the challenge of Ozyormy Goija, the Master of Puppets
Vanquished The Sentient
Defeated Our Preying Hostess
Defeated the Transporter
Answered the challenge of Uthos, the Ashen Born
Did as asked and ended it peacefully
Found and input one of the Five Eyes codes
Destroyed the prodigal spawn
Helped the Architect repaired the Interface
Helped the Old Man
Repaired the EVA suit and went for a walk outside Irid Novo
Turned off the lights, from the start to the end
Found the 66 coins
Talked to a cosmic God
Gained the trust of a cosmic God
Found a monolith and explored the Underworld
Socketed an upgrade chip
Synchronized a Breach
Reached a more challenging parallel universe
Opened the Observatory's Iris, and gazed in Sagittarius' depth
Defeated a horde
Printed an item using a blueprint
Equipped the cube and used a program
Summoned a friendly... pet?
Defeated the Alpha
Defeated Fear
Defeated Fear at full power
Defeated the Mad Scientist
Defeated her Majesty
Defeated the mother slug
Entered the Blue Sun universe
Hacked a turret
Found and equipped the white suit
Defeated the seven deadly sins