Surely Activision had to write a big check to get world famous Beatles singer Paul McCartney to write music for Bungie's recently released shooter, Destiny? Not so, according to Bungie.

"There was no check involved, big or otherwise," Bungie community manager Eric Osborne tells Vulture. "He's in it for the creativity." Though McCartney might not have seen a payday to be part of Destiny, his involvement with the game does have its benefits for the singer.

"He got a wonderful opportunity to reach an audience that wouldn't typically be immersed in Paul McCartney," Osborne said. "They might hear the name--of course he's everywhere, the Queen's Diamond Jubilee, the Olympics, obviously he's touring and recording nonstop--but he sees it as a way to reach a new audience that might not otherwise hear his music."

McCartney isn't exactly strapped for cash. Forbes estimates that he has a net worth of around $650 million.

McCartney and now-former Bungie composer Marty O'Donnell put together the score for Destiny, along with some other sound designers. The Beatles bassist also wrote Destiny's end credits song, "Hope for the Future," which you canlisten to in the video above or buy as a single sometime in the future.

Destiny launched two days ago for Xbox 360, Xbox One, PlayStation 3, and PlayStation 4. Save for some issues on college campuses and other minor troubles, the online-only game has seen an impressively smooth release. For more, check out GameSpot's review-in-progress for Destiny.

Eddie Makuch is a news editor at GameSpot, and you can follow him on Twitter @EddieMakuch

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