Here is the full list of all 17 CONCLUSE achievements.
Start a new game for the second time.
Use the linker book to travel back to the Docks.
Discover the hidden sewer.
Take the boat from the dock back to Cordova.
Beat the entire game.
Get the plow started.
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.
Check on the old lady in the subway.
Start a new game for the fifth time.
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.