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