Get 50m above the default waterline.

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Do a run without using rails (right click)

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Win the game while never using a single marble for anything except water bending (this means you can't shoot when you have marbles, or use rails)

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Complete a run without absorbing oil.

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Execute a scatter shot with 6 or more rails and 18 or more oil drops (note that one oily enemy's weakpoint releases 3 drops).

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Win the game by killing all the big enemies.

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Fastest achievement (shortest run time at achievement attained)