Have Glottis sing you the rusty anchor song.
NOTE: Glottis needs to be still in Calavera Cafe for you to get this achievement. If he is in the High Rollers Lounge you need to reload the game to a point where he is still sitting behind his piano.
This is the low-spoiler guide for "Oh Rusty Anchor" puzzle in Grim Fandango. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.