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.
Explore all of the lost labs.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
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.
Find every manifestation of the past.
Collect all 12 of Trevor's audio logs.
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.
Find 10 ancient human artifacts.
Activate the tower at the Verdant Canyon.
Solve "Seesaw" puzzle by picking up only one connector.
Activate the tower on the Southern Coast.
Solve "Switcheroo" without using the "keep connections" option.
Finish all three text adventures in the exhibition.
Explore New Jerusalem in its entirety.
Have a heated argument with Thecla.
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.
Find one Prometheus spark.
Work on solving a puzzle for more than 20 minutes.
Discover a trace of what happened on the island.
Activate the tower at the Wooded Plateau.
Solve one Sphinx monument.
Solve "Loop" without doing multiple circles.
Read 10 Social Media entries.
Experience a datastream overload.
Talk to each member of your team.
Solve one Pandora monument.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Find an ancient human artifact.
Return to a puzzle for a second attempt.
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.
Tell Purple what to do about his voice.
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.
Refuse to go along on the expedition.
Finish the calibration process.