Here is the full list of all 17 CONCLUSE achievements.
Bring the rat back to life by reattaching it's head.
Find and play the floppy disk.
Watch all three of the VHS tapes.
Solve the clock puzzle.
Check on the old lady in the subway.
Start a new game for the fifth time.
Start a new game for the second time.
Discover the hidden sewer.
Unlock the safe in the sewer management room.
Look through the binocular in Cordova three times.
Call home at every phone booth.
Call mom at every phone booth.
Call Carolyn at every phone booth.
Beat the entire game.
Use the linker book to travel back to the Docks.
Get the plow started.
Take the boat from the dock back to Cordova.