Here is the full list of all 24 The First Descendant achievements.
Complete Retrieve the Ironheart operation and return to Albion
Complete all available missions and Descendant duties in Kingston
Complete all available missions and Descendant duties in The Sterile Land
Complete all available missions and Descendant duties in Vespers
Complete a Void Intercept Battle for the first time
Complete 10 Void Intercept Battles
Reach Mastery Rank Level 10
Equip a module for the first time
Enhance any module to +7
Combine modules 7 times
Dismantle modules 77 times
Assign module socket types 10 times
Expand the module capacity of a weapon that uses Special Rounds
Expand a Descendant's Module Capacity
Level up a weapon through Weapon Transmission
Enhance a weapon's Unique Ability for the first time
Dismantle weapons 50 times
Enhance a Reactor for the first time
Complete research for the first time
Obtain an Ultimate tier weapon
Own 5 Descendants
Reach Level 40 with any Descendant
Clear up to Wave 7 in the Kingston Albion Resource Defense mission.
Successfully remove Colossi parts 2 times (excluding Retrieve the Ironheart operation)