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