Games part of the Boulder dash series
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1984DOSprotected puzzleDeveloper: First Star SoftwarePublisher: First Star Software
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1985DOSprotected puzzleDeveloper: First Star SoftwarePublisher: First Star Software
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1987DOS puzzleDeveloper: First Star SoftwarePublisher: Epyx
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1987DOSprotected puzzleDeveloper: Arcadia SystemsPublisher: First Star Software