The free demo of Lethal Geometry: the Training sector, Relay and Crossfire, up to Intensity 3. Build a machine of mirrors, splitters and lenses, watch the light tire in every enemy it burns, and grab a mirror when the wave slips past.

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Planned Release Date: To be announced

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About This Demo

This is the free demo of Lethal Geometry.

The Training sector: two maps, Relay and Crossfire, ten waves each, up to Intensity 3.

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One laser, and the machine you build around it

Route a single beam with mirrors, splitters and lenses until it covers the path. Every enemy it passes through drains it, so where you split it and where you strike is the whole game.

What's in the demo

  • Relay and Crossfire, with a lesson in every one of the first five waves.

  • Drones, Armored hulls that shield the column behind them, and Saboteurs that knock your mirrors out of line.

  • The upgrade draft after every wave, the Lab, loadouts and mutators.

  • Intensity up to step 3.

What the full game adds

  • Eight more maps in two more sectors, up to a finale with two emitters.

  • Reflectors, Jammers and the Warden.

  • Intensity up to step 10 and Endless on every map you win.

Good to know

  • Mouse and keyboard, Windows, English.

AI Generated Content Disclosure

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

Lethal Geometry's written content and level design were made with generative AI assistance: the in-game text, the upgrade and milestone descriptions, the map hints, the layout and waves of the maps, and this store page.

Nothing you see or hear is generated by an AI model. The board, the interface and the icons are drawn by the game's own code, so the build contains no image files, and every sound effect is synthesised by a script from mathematical waveforms. Nothing is generated while you play: there is no AI model in the game and no calls out to one.

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • OS: Windows 10 64-bit
    • Processor: Dual-core 2.0 GHz
    • Memory: 4 GB RAM
    • Graphics: OpenGL 3.3 compatible graphics, integrated GPUs included
    • Storage: 200 MB available space
    • Sound Card: Any
    • Additional Notes: Mouse and keyboard required.
    Recommended:
    • OS: Windows 11 64-bit
    • Processor: Quad-core 2.5 GHz
    • Memory: 8 GB RAM
    • Graphics: Any dedicated GPU with OpenGL 3.3
    • Storage: 200 MB available space
    • Sound Card: Any
    • Additional Notes: Mouse and keyboard required.
    Minimum:
    • OS: Ubuntu 22.04 64-bit or similar
    • Processor: Dual-core 2.0 GHz
    • Memory: 4 GB RAM
    • Graphics: OpenGL 3.3 compatible graphics, integrated GPUs included
    • Storage: 200 MB available space
    • Sound Card: Any
    • Additional Notes: Mouse and keyboard required. x86_64 only.
    Recommended:
    • OS: Ubuntu 24.04 64-bit or similar
    • Processor: Quad-core 2.5 GHz
    • Memory: 8 GB RAM
    • Graphics: Any dedicated GPU with OpenGL 3.3
    • Storage: 200 MB available space
    • Sound Card: Any
    • Additional Notes: Mouse and keyboard required. x86_64 only.
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