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.
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.
Solve all puzzles and monuments.
Help Byron get elected mayor.
Solve one Pandora monument.
Solve one Sphinx monument.
Explore all of the lost labs.
Collect all 12 of Trevor's audio logs.
Solve all regular puzzles.
Activate the tower in the Western Delta.
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 at the Circular Oasis.
Activate the tower on the Southern Coast.
Activate the tower at the Verdant Canyon.
Finish all three text adventures in the exhibition.
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.
Return to a puzzle for a second attempt.
Enter the Megastructure.
Activate the tower in the Eastern Wetlands.
Read 10 Social Media entries.
Discover a trace of what happened on the island.
Activate the tower at the Wooded Plateau.
Experience a datastream overload.
Solve "Loop" without doing multiple circles.
Get involved behind the scenes.
Find one Prometheus spark.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Activate the tower at the Grasslands Ring.
Build one bridge.
Find an ancient human artifact.
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.
Provide your digital signature to someone.
Tell Schuyler what to do with his life... or not.
Finish the calibration process.
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.
Collect all 12 of Lifthrasir's audio logs.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
Find every manifestation of the past.
Find 10 ancient human artifacts.