Here is the full list of all 50 Starfield achievements. It takes around 100-120 hours to unlock all of the achievements on Windows.
Complete "Legacy's End"
Complete "The Best There Is"
Join the Crimson Fleet
Complete "The Hammer Falls"
Complete "Surgical Strike"
Read 20 Skill Magazines
Join the Freestar Rangers
Reach Maximum Relationship Level with a Companion
Complete "One Giant Leap"
Collect 20 Quantum Essence
Complete "Entangled"
Complete "Unearthed"
Bypass 50 Digital Locks
Eliminate 300 Human Enemies
Complete "In Their Footsteps"
Complete 30 Terminal or Misc. Missions
Complete "High Price to Pay"
Reach Level 25
Complete "Further Into the Unknown"
Visit 20 Star Systems
Complete "A Legacy Forged"
Complete "The Devils You Know"
Access 50 Computers
Join the UC Vanguard
Complete 30 Activities
Complete "All That Money Can Buy"
Complete "Into the Unknown"
Reach Level 10
Build an Outpost
Modify a Ship
Reach Level 5
Join Constellation
Enter Space for the First Time
Join Ryujin Industries
Complete "Guilty Parties"
Complete "Executive Level"
Connect 5 Outposts with Cargo Links
Produce 500 Total Resources from Outposts
Visit all Star Systems
Land on 100 Planets
Gather 500 Organic Resources
Gather 500 Inorganic Resources
Mod 50 Weapons
Craft 100 Items
Recruit 10 Separate Companions
Collect 10 Ships
Eliminate 300 Creatures
Successfully Smuggle Contraband
Reach Level 50
Reach Level 100