Into the Breach is set in the far future where humanity fights against an army of giant monsters collectively called the Vek. To combat them, the player controls soldiers that operate giant mechs that can be equipped with a variety of weapons, armor, and other equipment. The game uses a turn-based combat system, allowing the player to coordinate the actions of their team in response to enemy moves and actions that serve to telegraph their attacks.[1]

In combat, the player controls three different mechs against the Vek, and will be given an objective for that map along with a fixed number of turns to complete that objective. The principal goal for any map is to protect civilian structures which support the power grid that supports the mechs, but additional objectives may be presented. Should a civilian structure be damaged or destroyed, the power grid is weakened. On each turn, Vek forces will move across the board, including the appearance of new Vek the next turn, and the player is shown the direction of intended attack. This gives the player the ability to then move each mech and fire one of its weapons as to either defeat the Vek unit, push the Vek off a line of attack, avoid an attack, or intercept an attack on civilian structures. Mechs can only take a limited amount of damage during battle before becoming inoperable, though a player can have a mech idle a turn to repair some damage; battle damage is otherwise completely repaired between maps.[2] Pilots of mechs that defeat a Vek gain experience points, which can be used to unlock new skills. The gameplay of Into the Breach has been compared to that of chess, as it is less about overpowering the opposing forces and instead about maintaining position control and sacrificing units to gain a larger advantage.[2][3][4]

Similar to FTL, the game is broken into a sequence of islands each with a number of scenarios (based on island sectors) to complete; while the islands remain the same each game, the scenarios themselves are generated procedurally in a roguelike manner. After completing the first island, the player is given the choice of which islands in the sequence to protect next; islands have various conditions that can affect combat scenarios, and more hazardous conditions can gain greater rewards from completing the scenarios on each.[3] Should the player lose any scenario, either due to their 3 mechs becoming disabled, losing their power grid, or failing to protect a specific target for that scenario, then the player has the option to send one of the pilots back in time prior to the start of the first mission - effectively starting a new game - retaining their current experience and abilities to give an edge in the next battle.[3] Reviewers for the website Rock Paper Shotgun described the gameplay as a mix of Pacific Rim and Edge of Tomorrow due to the time-traveling elements.[4] Other permanent improvements, such as new pilots or sets of mechs, become available as the player completes various milestones.

Development[edit]
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.[2] They set about to make the game focus on the impact of collateral damage so that defending buildings and other structures would become a priority rather than just winning.[2]

Subset included the effects of giant mechs-vs-giant alien battles on the landscape as the game time progress, with mountains being torn down, forests destroyed by fire, and buildings razed. To emphasize this in gameplay, they include the mechanic that mechs are powered from local power nodes in the buildings, so that if these buildings are destroyed, they may not be able to power their mechs. This created tough decisions for players, such as whether to destroy a building to get a short-term edge in battle or to prevent a catastrophe to a larger number of buildings. To further help emphasize the need to care for these buildings, Avellone's story was written to remind the player that as they fight with the mechs, there will be people cowering for safety in these buildings, and to create emotional impact when these people are killed when a building is destroyed.[2]

In contrast to XCOM, where a simple battle may take up to an hour to complete all objectives, Subset wanted each battle to be relatively short in terms of gameplay time. The limited turn counter was used to keep battles short, and Subset found that telegraphing the Vek's movements further helped to hasten the pace. They developed scenarios and situations to require the player to devise new strategies on the fly which they anticipated that players would build upon in later parts of the game.[2]

Development of Into the Breach started mid-2015, after all of Subset's commitments to FTL were completed, providing them with the financial security to move forward onto this project.[2] The game, announced in February 2017, was expected to be released on all major PC operating systems, though Subset did not expect this to be a simultaneous release.[5] 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.[2] Rock Paper Shotgun considered a early preview copy they had played in November 2017 as nearly complete outside of art assets and game balance issues, and reported that the game is expected to release in early 2018,[4] and was eventually set for February 27, 2018.[6]

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.[2] 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.[7] 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.