BlazBlue Entropy Effect

91Act, a studio that built its reputation on tight character action, brought that sensibility to the roguelike space with BlazBlue Entropy Effect, released on February 14, 2024. Rather than adapt the mainline BlazBlue fighting-game formula wholesale, 91Act constructed a run-based action game around the franchise’s characters, prioritizing moment-to-moment combat feel and build variety over narrative continuity.

Each run places the player in control of one of sixteen characters, each with a distinct moveset and combat rhythm—some are pressure-heavy rushdown types, others work at range or through specific elemental conditions. Runs are built around selecting and upgrading moves from a large pool of options, with elemental effects layering onto attacks to create emergent synergies. A legacy skill system allows certain abilities to carry across character selections within a run, meaning the order in which characters are unlocked and the skills they pass forward shapes what combinations become available. The result is a build space that rewards repeated experimentation across the full roster.

Two crossover expansions added characters and content from outside the BlazBlue universe entirely. The ICEY collaboration reunited that game’s protagonist with her Narrator character in a mode that plays directly on the meta-relationship central to the original ICEY. The Dead Cells crossover, which arrived in September 2025, added The Prisoner as a playable character alongside a purpose-built Metroidvania-style zone with an original story. Both crossovers are free additions, and 91Act has been explicit that their storylines are independent of the source IPs involved.

The game’s update history reflects a steady post-launch development arc. Following release, 91Act added online co-op lobbies and combat emotes in mid-2025, alongside a cross-platform save transfer feature. A formal BlazBlue storyline integration plan was confirmed in December 2025, signaling that the game’s connection to the broader franchise lore was still being actively developed. February 2026 brought a new playable character, Naoto, along with an extreme difficulty tier. Maintenance patches have continued into mid-2026. The Dead Cells crossover zone, constructed as a Metroidvania segment within an otherwise run-structured game, remains one of the more structurally unusual inclusions in the game’s content library.