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