Here is the full list of all 12 Merrily Perilly achievements.
Perry messed his pants.
Perry remained in the abbey.
Perry rode the cable car.
Perry and Gwen played hacky sack happily ever after.
Perry defeated the vampire count.
Perry joined the boatman.
Perry spoke to everyone.
Perry experienced every peril.
Perry collected all the hats.
Perry left town, but then he came back.
Perry fully experienced every peril.
Perry completed the Crisis Log.