I should mention the official platforms where they can purchase the game. Activision usually distributes COD through their website and platforms like PlayStation Store, Xbox Store, and Steam. Even though it's a console game, there might be a PC version. Wait, actually, Black Ops 3 was released for PS4 and Xbox One, and later for PC. Let me check the release dates to confirm. Yes, the PC version was released in 2016. So they can buy it on Steam or the Activision Store.

Summarize the key points: legal purchase options, why torrents are risky, and offer further help if they need more info. Keep the tone helpful and friendly, avoiding any direct links to pirated content. Make sure the response is in Spanish since the query is in Spanish. Also, structure it with clear sections for readability.

Also, check if there are free trials or promotions, but I don't think Black Ops 3 is currently free. Maybe mention the importance of supporting developers by purchasing the game.