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.
Maintain the status quo in New Jerusalem... for now.
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.
Find every manifestation of the past.
Explore all of the lost labs.
Collect all 12 of Trevor's audio logs.
Activate the tower in the Anthropic Hills.
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.
Explore the Museum of the Simulation in its entirety.
Visit New Jerusalem's Museum of the Simulation.
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.
Enter the Megastructure.
Activate the tower in the Eastern Wetlands.
Work on solving a puzzle for more than 20 minutes.
Discover a trace of what happened on the island.
Solve one Pandora monument.
Solve one Sphinx monument.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Read 10 Social Media entries.
Activate the tower at the Wooded Plateau.
Find one Prometheus spark.
Experience a datastream overload.
Solve "Loop" without doing multiple circles.
Get involved behind the scenes.
Find an ancient human artifact.
Activate the tower at the Grasslands Ring.
Build one bridge.
Talk to each member of your team.
Return to a puzzle for a second attempt.
Explore content on a lost terminal.
Embark on the expedition.
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.
Explore New Jerusalem in its entirety.
Solve "Switcheroo" without using the "keep connections" option.
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.
Finish all three text adventures in the exhibition.
Refuse to go along on the expedition.
Find 10 ancient human artifacts.