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.
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Assisted in escaping the Incinerator
Assisted in escaping the Arena
Assisted in escaping the Battlefield
Assisted in installing Windows
Escaped the Royal Promenade
Assisted in escaping the Dark Stairwell
Assisted in escaping the Ritual Chamber
Escape from the Crypts
Was there another way?
Escaped the Incinerator
Escaped the Arena
Escaped the Battlefield
Succesfully installed Windows
Assisted in escaping the Royal Promenade
Escape from the Dark Stairwell
Escape from the Ritual Chamber
Escape from the Royal Tomb