Here is the full list of all 17 CONCLUSE achievements.
Discover the hidden sewer.
Take the boat from the dock back to Cordova.
Beat the entire game.
Get the plow started.
Call home at every phone booth.
Unlock the safe in the sewer management room.
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.
Look through the binocular in Cordova three times.
Check on the old lady in the subway.
Start a new game for the fifth time.
Start a new game for the second time.
Call mom at every phone booth.
Call Carolyn at every phone booth.
Use the linker book to travel back to the Docks.