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.
Help Byron get elected mayor.
Activate the tower on the High Plain.
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.
Solve "Switcheroo" without using the "keep connections" option.
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.
Discover a trace of what happened on the island.
Activate the tower at the Wooded Plateau.
Read 10 Social Media entries.
Solve one Sphinx monument.
Get involved behind the scenes.
Experience a datastream overload.
Find an ancient human artifact.
Solve "Loop" without doing multiple circles.
Find one Prometheus spark.
Activate the tower at the Grasslands Ring.
Solve one Pandora monument.
Talk to each member of your team.
Solve one Prometheus monument.
Activate a Prometheus monument without stopping the spark-chasing music.
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 Purple what to do about his voice.
Tell Schuyler what to do with his life... or not.
Finish the calibration process.
Go above and beyond to change the future.
Solve all regular puzzles.
Defy death.
Solve all puzzles and monuments.
Discover a vision of things to come.
Solve "Seesaw" puzzle by picking up only one connector.
Work on solving a puzzle for more than 20 minutes.
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.