In this action roguelite, a firefly is your light. It follows you along its own path, the ground behind it goes dark, and the dark drains your sanity. Fight in real time through three levels and their guardians, turn four clubs into weapons, and play solo or with up to three friends.

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About This Game

Every map in Firefly is an escort. A firefly is the only light in the cave, apart from a few flares you carry. It follows you along its own path to the hold-out at the far end, and it waits while you fight. The ground it passes stays lit for a while, then goes dark. Step into the dark and your sanity drains until it drops you, the same as running out of health.



When it lands, the light swells to fill the arena, and the way out opens once nothing there is left alive.

An expedition


Three levels of five or six stops, a guardian at the end of every one: the Crypt Warden, the Bridge Troll, the Abyssal Lord. Each level opens with a fight. After that, every fork offers three gates: one to a fight and two to other stops, such as a camp to heal, a merchant, a cache, a stranger who trades power for a price you keep paying, or a door you can't read.

Four clubs


You start with four plain clubs. Rewards turn them into a sword, a bow, a wand that raises skeletons, or a healing staff, then stack modifiers on top: burn, freeze, bleed, pierce, ricochet, shatter.

Together


  • Up to four players, on one screen or online over Steam
  • Pull a downed friend back up by standing over them
  • Full controller support with Xbox button prompts

Between runs


Glow from every run, won or lost, lights the lantern tree. It changes your choices and your road, never your damage. Ten difficulties, Normal to Oblivion.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

We used generative AI for much of Firefly's art, 3D models, music and sound effects. People directed it, picked what to keep, and cut, fitted and assembled every piece.

- Concept art, menu and UI art and icons: Google and OpenAI image models and Flux, cut into the game by our own scripts.
- Characters, monsters, weapons and props: Meshy 3D models, fitted, rigged and animated in Blender, with free Quaternius animations.
- Music: Suno. Many sound effects: ElevenLabs. The rest are free sound libraries or made in code.
- The main menu background is an AI-generated video.
- Store and library art: Flux painted over renders of the game's own models.

The caves are built by our own code, not AI. Nothing generative runs while you play.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit
    • Processor: 4-core x64, 2.5 GHz
    • Memory: 4 GB RAM
    • Graphics: DirectX 12 or Vulkan 1.2 GPU with 2 GB VRAM (GTX 960, RX 470, Intel UHD 620)
    • DirectX: Version 12
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    • Additional Notes: Online co-op needs a broadband connection.
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 11 64-bit
    • Processor: 6-core x64, 3.5 GHz
    • Memory: 8 GB RAM
    • Graphics: GTX 1060, RX 580 or better
    • DirectX: Version 12
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    Minimum:
    • Requires an Apple processor
    • OS: macOS 11 Big Sur
    • Processor: Apple M1 (Apple silicon only)
    • Memory: 8 GB RAM
    • Graphics: Apple silicon GPU (Metal)
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    • Additional Notes: Apple silicon only; Intel Macs are not supported. Online co-op needs a broadband connection.
    Recommended:
    • Requires an Apple processor
    • OS: macOS 14 Sonoma or later
    • Processor: Apple M1 Pro, M2 or later (Apple silicon only)
    • Memory: 16 GB RAM
    • Graphics: Apple silicon GPU (Metal)
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    Minimum:
    • OS: Ubuntu 22.04 or equivalent (glibc 2.35+), current SteamOS 3
    • Processor: 4-core x64, 2.5 GHz
    • Memory: 4 GB RAM
    • Graphics: Vulkan 1.2 GPU, Mesa 22+ or a current NVIDIA driver
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    • Additional Notes: Needs libwayland-client and ALSA (PipeWire or PulseAudio through ALSA). Online co-op needs a broadband connection.
    Recommended:
    • OS: Ubuntu 24.04 or equivalent
    • Processor: 6-core x64, 3.5 GHz
    • Memory: 8 GB RAM
    • Graphics: GTX 1060, RX 580 or better
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
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