PAIN

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First, you need to have purchased the Sore Spots level from the PSN store or the Pain store. Next, you'll need to unlock the Painful difficulty level of Mad Science! Once you've done that, you need to complete the level without grabbing. You can take as long as you want, which makes it pretty easy. Start by knocking all of the crates down from the upper level by dropkicking them off the ledge. Then it's just a matter of knocking two colors together until they're all gone.