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