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