Jesper Kyd wrote the soundtrack for the original Assassin's Creed game.
Kyd's score combines dark orchestral sounds, vocal textures, and electronic elements to reinforce the game's medieval setting and modern-day framing device. The music shifts between tense stealth, large-scale pursuit, and reflective sequences involving Desmond Miles and the Animus.
The original game was released in 2007 and introduced Altaïr Ibn-La'Ahad, the first major historical protagonist of the franchise. Kyd's music helped establish an audio identity that continued into Assassin's Creed II, where he also served as composer.
This credit is sometimes confused with music from later entries. Lorne Balfe composed Assassin's Creed III, Brian Tyler composed Assassin's Creed IV: Black Flag, and Sarah Schachner became associated with later installments including Origins. The original game's soundtrack is specifically credited to Jesper Kyd.