Into the Breach came out of ideas that Ma and Davis had following the success of
FTL. They had tried various prototypes for a game, including one for a grid-based tactical system, which they recognized was seeing a resurgence in the video game industry due to the success of
XCOM: Enemy Unknown (2012). However, they still needed some type of hook to differentiate their game. This came as a response to films like
Man of Steel and
Pacific Rim, where "the whole city gets demolished, but no one cares because the good guys won", according to Ma. Subset said at the time of its reveal that
Into the Breach was still a ways off from release, as they had enough in place to show off the game's ideas and preliminary art, but they still lack a lot of content for the game, and prefer to perfect the game at their own pace. In addition to Avellone and Prunty, Subset Games has obtained help from Isla Schanuel for community management and user testing, Power Up Audio for audio work, and Polina Hristova to assist Ma in art assets.
Ben Prunty, who had composed the
FTL soundtrack, provided the music for
Into the Breach. Like with
FTL, Prunty and Subset wanted to use a style of music not normally associated with the narrative genre, but had difficulty in deciding which direction it should go, particularly that they felt that music for a strategy game should be soft and quiet. Ma shared with Prunty
2Cellos' take on
Hans Zimmer's "Mombasa" from
Inception: Music from the Motion Picture, which gave Prunty the inspiration to create the game's first music track, used in the game's teaser trailer. In addition to the digital score, Prunty added some guitar riffs atop the music, creating a motif that appeared throughout the tracks. Further, Prunty helped Subset to determine when music should be used in the game; rather than music playing constantly, he suggested to have music only start when the player completes the deployment of the mechs on a map, creating a dynamic for the game going forward. The macOS version followed later that year on August 9, 2018. The Nintendo Switch version followed later that month on August 28, 2018. A native Linux version was released on April 20, 2020. A free
Advanced Edition update to the game was released on July 19, 2022, for personal computers and Switch versions, adding more content including new squads, pilots and enemies, and an "Unfair" difficulty level. Additionally, a mobile version for
iOS and
Android was released the same day by
Netflix. == Reception ==