http://purl.org/dc/terms/source
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https://jp.linkedin.com/company/defiant-development-pty-ltd (accessed 2018-10-25)
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https://www.defiantdev.com/presskit/ (accessed 2018-10-25)
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https://www.facebook.com/pg/defiantdevelopment/about/?ref=page_internal (accessed 2018-10-25)
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https://www.mobygames.com/company/defiant-development (accessed 2018-11-15)
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