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Plagiarism is a common occurrence in the game industry.
Many games have even plagiarized their way to classical status, becoming milestones in the history of gaming.
When it comes to plagiarism, as long as there's no direct use of code, original artwork, or models, then copying gameplay is generally not legally recognized as plagiarism.
In the past year, there have been countless incidents of plagiarism, but only a very few have actually been judged as such by a court.
Tianyi has not been exempt from plagiarism; in fact, one could say they built their business on it.
They have many experienced planners, who can deduce a game developer's thought process and the remaining gameplay from the game kernel exhibited by a beta version, through clues and traces.
Even with just a test version, or a few minutes of a demo, they can discern the core enjoyment of a game and deduce additional gameplay from it.
