The song "Theme" from Battlefield is composed in the key of D minor. It was first introduced in the video game "Battlefield 1942" released in 2002, where it quickly gained popularity among gamers. The composer of the piece is Joel Eriksson, a Swedish musician who specializes in creating music for video games. The haunting melody is prominently performed by a full orchestra, featuring powerful brass and strings, creating an intense and epic atmosphere. Over the years, "Theme" has become an iconic piece associated with the Battlefield franchise, often played during important moments and trailers. Fun fact: The string section of the melody bears a resemblance to the famous "Dies Irae" motif from classical music.