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.
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.
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.
Activate the tower at the Grasslands Ring.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Talk to each member of your team.
Find an ancient human artifact.
Build one bridge.
Solve one Pandora monument.
Return to a puzzle for a second attempt.
Work on solving a puzzle for more than 20 minutes.
Find one Prometheus spark.
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.
Finish the calibration process.
Activate the tower on the High Plain.
Make a choice that will define the future.
Go above and beyond to change the future.
Solve all regular puzzles.
Defy death.
Solve all puzzles and monuments.
Explore all of the lost labs.
Discover a vision of things to come.
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.
Collect all 12 of Lifthrasir's audio logs.
Help Byron get elected mayor.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
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.
Provide your digital signature to someone.