Here is the full list of all 15 Amigdala achievements.
Start new game
Finish Chapter one
Finish Chapter two
Finish Chapter three
Finish Chapter four
Collects 10 batteries
Collects 30 batteries
Collects 50 batteries
Read 5 documents
Read 15 documents
Read 25 documents
Hear 4 audio files
Hear 8 audio files
Hear 12 audio files
"Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn"