This guide aims at providing a comprehensive account of

• all symbol plates,
  
• all symbols,
  
• all pictograms, and
  
• all projections

in Memorrha to facilitate unlocking achievements related to these elements of the game. Note that I have not unlocked all achievements yet which is why this is still work in progress. Yet I have received word from the devs that this is rather due to technical issues with some achievements. So the information in this guide should be fairly accurate and comprehensive. If you do find faulty info please drop a line in the comment section below.

And please note: THIS GUIDE DOES NOT PROVIDE ANY PUZZLE SOLUTIONS! BUT IT CONTAINS LOTS OF SPOILERS!!!

The guide is divided into three main sections:
A. Symbol Plates & Symbols
Here you can find information about all symbol plates and symbols available in the game. Look here if you are interested in the platelifter and scanning achievements.
B. Pictograms & Projections
Since some of the pictograms are hidden behind projection doors it made sense to me to combine the information about these two elements of the game. This sections relates mainly to the archivist achievements.
C. Areas
In this section you will find the above information consolidated for each area. I know this is a bit redundant but some may find it easier for their playthrough to have all info about a single area combined in one place.

The following table provides an overview of

• the amount of symbol plates in each area.
  Note that there is a distinction between movable symbol plates and non-movable symbol plates. The latter ones are plates that cannot be picked up even though you can scan for their symbol.
  
• the amount of symbols you can scan in each area.
  Note that these numbers assume that each symbol is scanned in the earliest possible area.
  
• the total amount of symbols that have been scanned by the end of each area.
  This is simply for easier reference during your playthrough because you can check the number of scanned symbols in your scanner.

The maximum amount of symbols that you can scan into your device is 88.

But there are 80 movable symbol plates and 21 non-movable symbol plates which means there are a total of 101 scanable symbol plates. However, some of these plates contain the same symbol:


There are a total of 21 plates with only 8 symbols. That means that the number of 101 scanable plates has to be reduced by the difference of 21 and 8 to calculate the total amount of symbols. 101 minus 13 equals 88.

The following table provides an overview of

• the amount of pictograms in each area
  Note the distinction between accessible pictograms and projection-hidden pictograms. Accessible pictograms are those that are not hidden by a projection in that area but they may still be hidden in a different fashion (e.g. a puzzle may have to be solved).
  
• the total amount of pictograms that have been scanned at the end of each area
  This column is for easy reference during your playthrough. Consult your scanner to check the amount of pictograms you have scanned so far.
  
• the amount of projections not related to pictograms
  These projections unlock sections of the current area that do not hold a single pictogram. Or they unlock completely new areas (potentially with pictograms).

21. Above Ascension Hall

The following sections provide the above information compiled by areas.