Free Clanker - 15G (Original Achievement)
Difficulty: Medium
Estimated Period of Time: Short
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To get to Clanker you need to go to the level "Clanker's Cavern".
As soon as the level starts, you will need to run forward to the yellow water and jump in. Then swim down and around the back to find a pipe. Go through the pipe and you will be staring directly at Clanker, who will introduce itself.
Now surface for air and when ready swim under Clanker. You will see a long chain connecting him to the ground, you want to follow the chain all the way to the bottom of the level and you will see a giant Anvil with a Key in it. Your goal is to swim through the loop part of the Key three times. This will instantly free Clanker to the surface and unlock your Achievement. (The reason it seems difficult is because most people, even veterans, can drown easily down here. There is a blue fish swimming around and spitting out air bubbles, if you find him and swim through an air bubble you will get two units of air back. This is a must if you intend to free Clanker, get the Green Jinjo, and collect the Music Notes down here in one attempt.)