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.
Solve all regular puzzles.
Solve one Pandora monument.
Explore all of the lost labs.
Solve one Sphinx monument.
Collect all 12 of Trevor's audio logs.
Maintain the status quo in New Jerusalem... for now.
Activate the tower on the High Plain.
Activate the tower in the Anthropic Hills.
Activate the tower in the Western Delta.
Solve one Prometheus monument.
Free Prometheus from his chains.
Activate the tower at the Circular Oasis.
Activate the tower at the Verdant Canyon.
Find an ancient human artifact.
Read 10 Social Media entries.
Activate the tower on the Southern Coast.
Find one Prometheus spark.
Explore the Museum of the Simulation in its entirety.
Visit New Jerusalem's Museum of the Simulation.
Provide your digital signature to someone.
Tell Schuyler what to do with his life... or not.
Activate the tower in the Lost Marshes.
Activate the tower in the Flooded Valley.
Read 30 texts on terminals.
Activate the tower on the Desolate Island.
Return to a puzzle for a second attempt.
Enter the Megastructure.
Activate the tower in the Eastern Wetlands.
Discover a trace of what happened on the island.
Activate the tower at the Wooded Plateau.
Talk to each member of your team.
Experience a datastream overload.
Activate the tower at the Grasslands Ring.
Build one bridge.
Explore content on a lost terminal.
Embark on the expedition.
Finish the calibration process.
Get involved behind the scenes.
Go above and beyond to change the future.
Defy death.
Solve all puzzles and monuments.
Explore New Jerusalem in its entirety.
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.
Work on solving a puzzle for more than 20 minutes.
Activate a Prometheus monument without stopping the spark-chasing music.
Collect all 12 of Lifthrasir's audio logs.
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.