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