Here is the full list of all 17 CONCLUSE achievements.
Look through the binocular in Cordova three times.
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.
Find and play the floppy disk.
Start a new game for the fifth time.
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.
Check on the old lady in the subway.
Start a new game for the second time.
Call home at every phone booth.
Call mom at every phone booth.
Call Carolyn at every phone booth.
Use the linker book to travel back to the Docks.