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.
Discover a vision of things to come.
Solve all puzzles and monuments.
Solve one Pandora monument.
Collect all 12 of Lifthrasir's audio logs.
Work on solving a puzzle for more than 20 minutes.
Finish all three text adventures in the exhibition.
Help Byron get elected mayor.
Activate the tower in the Western Delta.
Solve all regular puzzles.
Explore all of the lost labs.
Activate the tower in the Anthropic Hills.
Use a functioning Somnodrome.
Activate the tower on the High Plain.
Free Prometheus from his chains.
Activate the tower on the Southern Coast.
Activate the tower at the Verdant Canyon.
Solve one Sphinx monument.
Activate the tower at the Circular Oasis.
Explore New Jerusalem in its entirety.
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.
Read 10 Social Media entries.
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.
Experience a datastream overload.
Find one Prometheus spark.
Solve "Loop" without doing multiple circles.
Get involved behind the scenes.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Find an ancient human artifact.
Talk to each member of your team.
Activate the tower at the Grasslands Ring.
Build one bridge.
Return to a puzzle for a second attempt.
Embark on the expedition.
Explore content on a lost terminal.
Provide your digital signature to someone.
Finish the calibration process.
Solve "Switcheroo" without using the "keep connections" option.
Solve "Seesaw" puzzle by picking up only one connector.
Collect all 12 of Trevor's audio logs.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
Tell Purple what to do about his voice.
Refuse to go along on the expedition.
Find every manifestation of the past.
Find 10 ancient human artifacts.
Tell Schuyler what to do with his life... or not.