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.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
Refuse to go along on the expedition.
Make a choice that will define the future.
Go above and beyond to change the future.
Defy death.
Find every manifestation of the past.
Solve all puzzles and monuments.
Find 10 ancient human artifacts.
Solve "Switcheroo" without using the "keep connections" option.
Solve "Seesaw" puzzle by picking up only one connector.
Finish all three text adventures in the exhibition.
Help Byron get elected mayor.
Discover a vision of things to come.
Activate the tower on the High Plain.
Solve all regular puzzles.
Explore all of the lost labs.
Collect all 12 of Trevor's audio logs.
Collect all 12 of Lifthrasir'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.
Activate the tower at the Verdant Canyon.
Activate the tower on the Southern Coast.
Explore New Jerusalem in its entirety.
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.
Return to a puzzle for a second attempt.
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 "Loop" without doing multiple circles.
Solve one Sphinx monument.
Read 10 Social Media entries.
Experience a datastream overload.
Get involved behind the scenes.
Talk to each member of your team.
Solve one Pandora monument.
Find one Prometheus spark.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Find an ancient human artifact.
Activate the tower at the Grasslands Ring.
Build one bridge.
Explore content on a lost terminal.
Embark on the expedition.
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.
Tell Purple what to do about his voice.
Provide your digital signature to someone.
Finish the calibration process.