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