Ball x Pit received a paid DLC expansion called Risen Ballbylon priced at $6.99. The expansion adds four new biomes, eight new playable characters, 24 new balls, 20 new ball evolutions, 20 new buildings, and 46 new passive abilities. It functions as endgame content available only after completing the base game.
The first new stage, FLOODEDxSEWERS, introduces deep-sea enemies like sharks and mermen that attack with spears. A new material called Crystals gates progression, appearing in scarce supply early on and required to build new structures and unlock new playable Hunters. The new Hunters are described as notably more powerful than base game characters, with one example, the Wallbreaker, firing balls that bounce off walls and split into smaller projectiles.
The expansion demands a fully upgraded base and grinding to progress through its difficult stages. According to the review, the DLC delivers substantial content for its price and remains consistent with the base game's design, though it poses a significant challenge spike for players who did not engage with New Game Plus modes.