Paul McCartney dropped by The Tonight Show Wednesday to plug his new single, “Hope for the Future,” which he wrote for the popular video game Destiny. Paul also admitted to host Jimmy Fallon that while it wasn’t hard for him to write the music for a video game, he’s pretty clueless when it comes to playing them.

When Fallon brought up playing the popular video game Rock Band, which contains some songs from McCartney’s former band The Beatles, the 72-year-old rock legend confessed he’s not very good and added, “It’s very hard.”

“My grandkids play and they kill me every time,” McCartney explained, then added, “But I say, ‘I wrote it.'”

McCartney’s no stranger to writing music for other projects. He also penned the theme song for the 1973 James Bond movie, Live and Let Die, and told Fallon he enjoys the challenge.

“It depends how you think of songwriting,” he explained. “I kind of think of it in a way like a craft. So I like writing songs, very personal songs just for me, but I also like when someone asks me like that, you know…It’s a bit of a challenge.”

With Christmas right around the corner, Fallon asked Paul to name some of his favorite holiday songs.  The veteran rocker said “The Christmas Song” by Nat King Cole and “‘Wonderful Christmastime’ by Paul McCartney.”

Copyright 2014 ABC News Radio

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Cover photo: Marshal Segal