2K released the XCOM 2: War of the Chosen - Original Game Soundtrack digitally on August 29, 2017. The album features original music by Tim Wynn.

"Overall the music for XCOM 2: War of the Chosen has a much darker and grittier tone that of XCOM2," Wynn described. Although XCOM 2 is about Earth's potential alien encounter with Earth, for this score I went old school and went more analog. It was my first score using the Matrix Brute. It's a wicked sounding analog beast. I guess you could best describe the XCOM 2: War of the Chosen sound as being orchestral analog."

XCOM 2: War of the Chosen also allowed Wynn to revisit the themes he created for XCOM2 and XCOM2: Shen's Last Gift. "Even though the focus of the music for XCOM 2: War of the Chosen is mainly on the new characters, there is still plenty of themes from XCOM 2," said Wynn. "The emotional themes for the WOTC soundtrack actually come from the first DLC XCOM 2 Shen's Last Gift. The theme revolves around a father saying goodbye to his daughter Lily Shen."

XCOM 2: War of the Chosen adds extensive new content in the fight against ADVENT when additional resistance factions form in order to eliminate the alien threat on Earth. In response, a new enemy, known as the "Chosen," emerges with one goal: recapture the Commander. The expansion includes new Hero classes to counter the "Chosen", new enemies, missions, environments and increased depth in strategic gameplay.

"The mostly heroic XCOM theme, and sinister ADVENT still play a big role. There are quite a few new themes introduced in XCOM 2: War of the Chosen, but the big three are Chosen themes: The Warlock, The Assassin and The Hunter." These themes can be heard in the tracks "War of the Chosen" (Chosen theme), "Shadow Domain" (Assassin Theme), "Hidden and Deadly" (Assassin Theme), "Warlock" (Warlock theme), and "Deadeye" (Hunter theme).