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