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