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