Here is the full list of all 20 We Were Here Too achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Escape from the Royal Tomb
Escape from the Crypts
Escape from the Ritual Chamber
Assisted in escaping the Ritual Chamber
Escape from the Dark Stairwell
Assisted in escaping the Dark Stairwell
Assisted in escaping the Royal Promenade
Escaped the Royal Promenade
Succesfully installed Windows
Assisted in installing Windows
Escaped the Arena
Assisted in escaping the Arena
Escaped the Battlefield
Assisted in escaping the Battlefield
Escaped the Incinerator
Assisted in escaping the Incinerator
Was this sacrifice neccessary?
Was there another way?
...
Invite a friend who is good at solving puzzles!