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