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