diff --git a/app/src/main/java/sib/bedohswe/hellofabric/Main.java b/app/src/main/java/sib/bedohswe/hellofabric/Main.java
index 5907918..0ccba46 100644
--- a/app/src/main/java/sib/bedohswe/hellofabric/Main.java
+++ b/app/src/main/java/sib/bedohswe/hellofabric/Main.java
@@ -1,11 +1,14 @@
 package sib.bedohswe.hellofabric;
 
 public class Main {
+	public static void callEntrypoints() {}
+
 	public String getMessage() {
 		return "Hello World!";
 	}
 
 	public static void main(String args[]) {
+		callEntrypoints();
 		System.out.println(new Main().getMessage());
 	}
 }
diff --git a/app/src/main/java/sib/bedohswe/hellofabric/modloader/GamePatchImpl.java b/app/src/main/java/sib/bedohswe/hellofabric/modloader/GamePatchImpl.java
new file mode 100644
index 0000000..60784c9
--- /dev/null
+++ b/app/src/main/java/sib/bedohswe/hellofabric/modloader/GamePatchImpl.java
@@ -0,0 +1,49 @@
+package sib.bedohswe.hellofabric.modloader;
+
+import com.google.j2objc.annotations.Property;
+import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.api.ModInitializer;
+import net.fabricmc.loader.impl.FabricLoaderImpl;
+import net.fabricmc.loader.impl.game.patch.GamePatch;
+import net.fabricmc.loader.impl.launch.FabricLauncher;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.*;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import static sib.bedohswe.hellofabric.modloader.GameProviderImpl.PROPERTY_APP_DIRECTORY;
+
+public class GamePatchImpl extends GamePatch {
+	public static void initClient() {
+		Path runDir = Paths.get(System.getProperty(PROPERTY_APP_DIRECTORY));
+		FabricLoaderImpl loader = FabricLoaderImpl.INSTANCE;
+		loader.prepareModInit(runDir, FabricLoaderImpl.INSTANCE.getGameInstance());
+		loader.invokeEntrypoints("main", ModInitializer.class, ModInitializer::onInitialize);
+		loader.invokeEntrypoints("client", ClientModInitializer.class, ClientModInitializer::onInitializeClient);
+	}
+
+	@Override
+	public void process(FabricLauncher launcher, Function<String, ClassNode> classSource, Consumer<ClassNode> classEmitter) {
+		String entrypoint = launcher.getEntrypoint();
+		ClassNode entrypointClazz = Objects.requireNonNull(classSource.apply(entrypoint), "Failed to load entrypoint class.");
+
+		MethodNode initMethod = Objects.requireNonNull(findMethod(entrypointClazz,
+				(method) -> method.name.equals("callEntrypoints") && method.desc.equals("()V")
+		), "Failed load load entrypoint method.");
+
+		initMethod.instructions.insertBefore(initMethod.instructions.getFirst(), new MethodInsnNode(
+				Opcodes.INVOKESTATIC,
+				"sib/bedohswe/hellofabric/modloader/GamePatchImpl",
+				"initClient",
+				"()V",
+				false));
+
+		classEmitter.accept(entrypointClazz);
+	}
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameProviderImpl.java b/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameProviderImpl.java
index 5f1b2cb..da3d889 100644
--- a/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameProviderImpl.java
+++ b/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameProviderImpl.java
@@ -26,7 +26,7 @@ public class GameProviderImpl implements GameProvider {
 
 	public static final String PROPERTY_APP_DIRECTORY = "appDirectory";
 
-	private static final GameTransformer TRANSFORMER = new GameTransformerImpl();
+	private static final GameTransformer TRANSFORMER = new GameTransformer(new GamePatchImpl());
 
 	private Arguments arguments;
 	private Path appJar;
diff --git a/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameTransformerImpl.java b/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameTransformerImpl.java
deleted file mode 100644
index 17b54cb..0000000
--- a/app/src/main/java/sib/bedohswe/hellofabric/modloader/GameTransformerImpl.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package sib.bedohswe.hellofabric.modloader;
-
-import net.fabricmc.loader.impl.game.patch.GameTransformer;
-
-public class GameTransformerImpl extends GameTransformer {
-	/*
-	* @param className The class name,
-	* @return The transformed class data.
-	*/
-	@Override
-	public byte[] transform(String name) {
-		return null;
-	}
-}
-