diff --git a/Cargo.toml b/Cargo.toml
index 5eb7042..34eb2db 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,7 @@ keywords = ["bevy", "rhai", "scripting", "game", "gamedev"]
 [features]
 lua = ["mlua/luajit"]
 rhai = ["dep:rhai"]
+ruby = ["dep:magnus"]
 
 [dependencies]
 bevy = { default-features = false, version = "0.16", features = ["bevy_asset", "bevy_log"] }
@@ -25,11 +26,12 @@ rhai = { version = "1.14.0", features = [
 thiserror = "1.0.40"
 anyhow = "1.0.82"
 tracing = "0.1.40"
-mlua = { version = "0.9.8", features = [
+lua = { version = "0.9.8", features = [
     "luajit",
     "vendored",
     "send",
 ], optional = true }
+magnus = { version = "0.6.4", optional = true }
 
 [[example]]
 name = "call_function_from_rust_rhai"
diff --git a/src/runtimes/mod.rs b/src/runtimes/mod.rs
index c01166f..96bf325 100644
--- a/src/runtimes/mod.rs
+++ b/src/runtimes/mod.rs
@@ -2,3 +2,5 @@
 pub mod lua;
 #[cfg(feature = "rhai")]
 pub mod rhai;
+#[cfg(feature = "ruby")]
+pub mod ruby;
diff --git a/src/runtimes/ruby.rs b/src/runtimes/ruby.rs
new file mode 100644
index 0000000..15b9a18
--- /dev/null
+++ b/src/runtimes/ruby.rs
@@ -0,0 +1,178 @@
+use bevy::{
+    asset::Asset,
+    ecs::{component::Component, schedule::ScheduleLabel, system::Resource},
+    reflect::TypePath,
+};
+use serde::Deserialize;
+
+use crate::{
+    assets::GetExtensions,
+    callback::{FromRuntimeValueWithEngine, IntoRuntimeValueWithEngine},
+    FuncArgs, Runtime,
+};
+
+#[derive(Resource)]
+pub struct RubyRuntime {}
+
+#[derive(ScheduleLabel, Clone, PartialEq, Eq, Debug, Hash, Default)]
+pub struct RubySchedule;
+
+#[derive(Asset, Debug, Deserialize, TypePath)]
+pub struct RubyScript(pub String);
+
+#[derive(Component)]
+pub struct RubyScriptData;
+
+impl GetExtensions for RubyScript {
+    fn extensions() -> &'static [&'static str] {
+        todo!()
+    }
+}
+
+impl From<String> for RubyScript {
+    fn from(value: String) -> Self {
+        todo!()
+    }
+}
+
+impl Default for RubyRuntime {
+    fn default() -> Self {
+        Self {}
+    }
+}
+
+#[derive(Clone)]
+pub struct RubyValue(());
+
+impl Runtime for RubyRuntime {
+    type Schedule = RubySchedule;
+
+    type ScriptAsset = RubyScript;
+
+    type ScriptData = RubyScriptData;
+
+    type CallContext = ();
+
+    type Value = RubyValue;
+
+    type RawEngine = ();
+
+    fn with_engine_mut<T>(&mut self, f: impl FnOnce(&mut Self::RawEngine) -> T) -> T {
+        todo!()
+    }
+
+    fn with_engine<T>(&self, f: impl FnOnce(&Self::RawEngine) -> T) -> T {
+        todo!()
+    }
+
+    fn eval(
+        &self,
+        script: &Self::ScriptAsset,
+        entity: bevy::prelude::Entity,
+    ) -> Result<Self::ScriptData, crate::ScriptingError> {
+        todo!()
+    }
+
+    fn register_fn(
+        &mut self,
+        name: String,
+        arg_types: Vec<std::any::TypeId>,
+        f: impl Fn(
+                Self::CallContext,
+                Vec<Self::Value>,
+            ) -> Result<
+                crate::promise::Promise<Self::CallContext, Self::Value>,
+                crate::ScriptingError,
+            > + Send
+            + Sync
+            + 'static,
+    ) -> Result<(), crate::ScriptingError> {
+        todo!()
+    }
+
+    fn call_fn(
+        &self,
+        name: &str,
+        script_data: &mut Self::ScriptData,
+        entity: bevy::prelude::Entity,
+        args: impl for<'a> crate::FuncArgs<'a, Self::Value, Self>,
+    ) -> Result<Self::Value, crate::ScriptingError> {
+        todo!()
+    }
+
+    fn call_fn_from_value(
+        &self,
+        value: &Self::Value,
+        context: &Self::CallContext,
+        args: Vec<Self::Value>,
+    ) -> Result<Self::Value, crate::ScriptingError> {
+        todo!()
+    }
+}
+
+pub mod prelude {
+    pub use super::RubyRuntime;
+}
+
+impl<T> FromRuntimeValueWithEngine<'_, RubyRuntime> for T {
+    fn from_runtime_value_with_engine(value: RubyValue, engine: &()) -> Self {
+        todo!();
+    }
+}
+
+impl<T> IntoRuntimeValueWithEngine<'_, T, RubyRuntime> for T {
+    fn into_runtime_value_with_engine(value: T, engine: &()) -> RubyValue {
+        todo!();
+    }
+}
+
+impl FuncArgs<'_, RubyValue, RubyRuntime> for () {
+    fn parse(self, _engine: &()) -> Vec<RubyValue> {
+        Vec::new()
+    }
+}
+
+impl<T> FuncArgs<'_, RubyValue, RubyRuntime> for Vec<T> {
+    fn parse(self, engine: &()) -> Vec<RubyValue> {
+        self.into_iter().map(|x| RubyValue(())).collect()
+    }
+}
+
+macro_rules! impl_tuple {
+    ($($idx:tt $t:tt),+) => {
+        impl<'a, $($t,)+> FuncArgs<'a, RubyValue, RubyRuntime>
+            for ($($t,)+)
+        {
+            fn parse(self, engine: &'a ()) -> Vec<RubyValue> {
+                todo!();
+            }
+        }
+    };
+}
+
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U, 21 V, 22 W, 23 X, 24 Y, 25 Z);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U, 21 V, 22 W, 23 X, 24 Y);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U, 21 V, 22 W, 23 X);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U, 21 V, 22 W);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U, 21 V);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T, 20 U);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S, 19 T);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R, 18 S);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q, 17 R);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P, 16 Q);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O, 15 P);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N, 14 O);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M, 13 N);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L, 12 M);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K, 11 L);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J, 10 K);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I, 9 J);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H, 8 I);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G, 7 H);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F, 6 G);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E, 5 F);
+impl_tuple!(0 A, 1 B, 2 C, 3 D, 4 E);
+impl_tuple!(0 A, 1 B, 2 C, 3 D);
+impl_tuple!(0 A, 1 B, 2 C);
+impl_tuple!(0 A, 1 B);
+impl_tuple!(0 A);
diff --git a/tests/tests.rs b/tests/tests.rs
index 7dcf443..825e6ec 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -482,3 +482,32 @@ mod lua_tests {
 
     scripting_tests!(LuaRuntime, "lua", "lua");
 }
+
+#[cfg(feature = "ruby")]
+mod ruby_tests {
+    use bevy::prelude::*;
+    use bevy_scriptum::runtimes::ruby::{prelude::*, RubyScriptData};
+
+    impl AssertStateKeyValue for RubyRuntime {
+        type ScriptData = RubyScriptData;
+
+        fn assert_state_key_value_i64(world: &World, _entity_id: Entity, key: &str, value: i64) {
+            todo!();
+        }
+
+        fn assert_state_key_value_i32(world: &World, _entity_id: Entity, key: &str, value: i32) {
+            todo!();
+        }
+
+        fn assert_state_key_value_string(
+            world: &World,
+            _entity_id: Entity,
+            key: &str,
+            value: &str,
+        ) {
+            todo!();
+        }
+    }
+
+    scripting_tests!(RubyRuntime, "ruby", "rb");
+}