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.
Help Byron get elected mayor.
Help Rand get elected mayor.
Use a functioning Somnodrome.
Solve "Switcheroo" without using the "keep connections" option.
Have a heated argument with Thecla.
Explore New Jerusalem in its entirety.
Finish all three text adventures in the exhibition.
Solve "Loop" without doing multiple circles.
Solve "Seesaw" puzzle by picking up only one connector.
Get involved behind the scenes.
Tell Purple what to do about his voice.
Explore the Museum of the Simulation in its entirety.
Refuse to go along on the expedition.
Go above and beyond to change the future.
Discover a vision of things to come.
Defy death.
Solve all puzzles and monuments.
Solve all regular puzzles.
Read 10 Social Media entries.
Explore all of the lost labs.
Collect all 12 of Trevor's audio logs.
Collect all 12 of Lifthrasir's audio logs.
Find every manifestation of the past.
Find 10 ancient human artifacts.
Solve one Sphinx monument.
Solve one Pandora monument.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
Make a choice that will define the future.
Maintain the status quo in New Jerusalem... for now.
Activate the tower on the High Plain.
Activate the tower in the Anthropic Hills.
Find an ancient human artifact.
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.
Read 30 texts on terminals.
Activate the tower in the Lost Marshes.
Activate the tower in the Flooded Valley.
Activate the tower on the Desolate Island.
Enter the Megastructure.
Activate the tower in the Eastern Wetlands.
Activate the tower at the Wooded Plateau.
Find one Prometheus spark.
Discover a trace of what happened on the island.
Experience a datastream overload.
Talk to each member of your team.
Activate the tower at the Grasslands Ring.
Build one bridge.
Work on solving a puzzle for more than 20 minutes.
Explore content on a lost terminal.
Return to a puzzle for a second attempt.
Embark on the expedition.
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.