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