What’s this? DragonRuby Game Toolkit

What’s this? DragonRuby Game Toolkit

April 6, 2026

Ruby outside the web browser. On a game cartridge. Sort of.

Every so often, something appears in the Ruby world that doesn’t fit the usual categories. It’s not a web framework. Not a gem for background jobs. Not a Rails performance tweak.

It’s a game engine. And it runs on a Nintendo Switch.

The thing

DragonRuby Game Toolkit is a cross-platform 2D game engine where you write code in Ruby. Actual Ruby. Not a transpiled subset. Not a configuration language masquerading as Ruby.

You write:

def tick(args)
  args.outputs.sprites << {
    x: 100, y: 100, w: 50, h: 50,
    path: "sprites/hero.png"
  }
end

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