Here is the full list of all 59 The Talos Principle 2 achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Make a choice that will define the future.
Go above and beyond to change the future.
Defy death.
Solve all puzzles and monuments.
Help Byron get elected mayor.
Discover a vision of things to come.
Activate the tower on the High Plain.
Solve all regular puzzles.
Collect all 12 of Lifthrasir's audio logs.
Collect all 12 of Trevor's audio logs.
Explore all of the lost labs.
Activate the tower in the Anthropic Hills.
Use a functioning Somnodrome.
Activate the tower in the Western Delta.
Free Prometheus from his chains.
Activate the tower at the Circular Oasis.
Activate the tower at the Verdant Canyon.
Activate the tower on the Southern Coast.
Finish all three text adventures in the exhibition.
Explore New Jerusalem in its entirety.
Activate the tower in the Lost Marshes.
Activate the tower in the Flooded Valley.
Activate the tower on the Desolate Island.
Read 30 texts on terminals.
Return to a puzzle for a second attempt.
Work on solving a puzzle for more than 20 minutes.
Solve one Sphinx monument.
Solve "Seesaw" puzzle by picking up only one connector.
Solve "Loop" without doing multiple circles.
Solve one Pandora monument.
Activate the tower in the Eastern Wetlands.
Enter the Megastructure.
Discover a trace of what happened on the island.
Activate the tower at the Wooded Plateau.
Read 10 Social Media entries.
Experience a datastream overload.
Get involved behind the scenes.
Activate the tower at the Grasslands Ring.
Talk to each member of your team.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Find an ancient human artifact.
Explore content on a lost terminal.
Build one bridge.
Find one Prometheus spark.
Embark on the expedition.
Explore the Museum of the Simulation in its entirety.
Visit New Jerusalem's Museum of the Simulation.
Tell Purple what to do about his voice.
Tell Schuyler what to do with his life... or not.
Provide your digital signature to someone.
Finish the calibration process.
Solve "Switcheroo" without using the "keep connections" option.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
Refuse to go along on the expedition.
Find every manifestation of the past.
Find 10 ancient human artifacts.