Here is the full list of all 38 Returnal achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Collect all main Achievements
Finish Fractured Wastes Survey
Gain a moment of peace
Kill 100 Hostiles with Disgorgers
Open the Locked Door
Finish Calculated Risk
Complete a daily challenge in Simulation Mode
Finish Overgrown Ruins Survey
Finish Crimson Wastes Survey
Finish Derelict Citadel Survey
Finish Abyssal Scar Survey
Defeat Algos' final form
Complete the first Hospital sequence
Achieve Weapon Proficiency level 30
Die and return in the Tower
Defeat Algos' first form
Have 5 Parasites simultaneously
Finish Act 3
Finish Echoing Ruins Survey
Complete all House sequences
Returned by an Artifact
Finish Act 2
Defeat Ophion
Achieve 200% Max Integrity
Defeat Hyperion
Finish Act 1
Defeat Nemesis
Complete a Xeno-archive set (excluding Tower of Sisyphus)
Unlock all translation tiers of a Xenoglyph
Defeat Ixion
Retrieve 10 Scout Logs
Defeat Phrike
Complete the first House sequence
Scan a Xenoglyph
Learn the basics of survival on Atropos
Achieve maximum Adrenaline Level
Perform 5 successful Overloads in a row
Experience a new cycle after death