Credit goes to the spawn of Natas on this one. The save is tested and will unlock "Super-sleuth 30G" and "Master treasure hunter 100g"<br />
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load up and play Tintin & Haddock mode and go to the doors on the right and play the level "The Ghost Pirate" follow this you-tube video:<br />
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http://www.youtube.com/watch?v=4NLRl5B2rZw&feature=plcp<br />
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and when you dig up the bone both achievements will unlock