Here is the full list of all 15 illumine achievements.
Get two As to fight each other
Collect your first book
Communicate with others
Take care of your surroundings
Pay attention to everyone
Find the reason for their aggressiveness
Help those in trouble
Help those in trouble, whoever they are
Appease them
Share your time
See things from a different point of view
Reach enlightenment
Get an R to kill an A
Follow the light
Light at the end of the tunnel