Yes, Sintra & Queluz Treasure Hunt is completely free and it doesn't have any in-app purchases or subscriptions.
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Sintra & Queluz Treasure Hunt is free.
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I downloaded the game for some fun, and in the first area for the second palace, the throne room, it gives you a very specific plant to scan only working if you scan that exact plant. It does not match up, and there is no plant to scan that matches it. Other than that, no problems.
