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You're looking for information on Hatsune Miku Project DIVA Mega Mix on PC and a helpful review. I'll provide you with an overview and insights.

Hatsune Miku Project DIVA Mega Mix, also known as "Mega Mix" or "Project DIVA Mega Mix", is a rhythm game developed by SEGA. The game features the popular virtual singer Hatsune Miku and other Vocaloids. It's a part of the Hatsune Miku Project DIVA series, which has been entertaining fans with its unique blend of music, rhythm gameplay, and Miku's charm.

Please note that I don't condone or promote piracy. If you're interested in playing Hatsune Miku Project DIVA Mega Mix on PC, I recommend purchasing the game through Steam or other official channels. This way, you'll have access to updates, support, and a smoother gaming experience.

The game was initially released for arcade and later ported to consoles like PlayStation Vita, PlayStation 4, and Nintendo Switch. For PC, the game was released through Steam, which allows for a more accessible experience. As for the crack, I'm assuming you're looking for information on a potential crack for the PC version.