🔥 Hot Deploy Engine

Hot Deploy Engine is a runtime system that lets you deliver new C# code directly into a running Unity game — even one that players already have installed.

Unlike “hot reload” tools (which only speed up coding in the editor), Hot Load actually updates production builds in players’ hands. That means you can fix bugs, patch logic, or roll out new features instantly — without waiting for an app store review or forcing players to reinstall.

Feature Overview

Hot Deploy Engine lets you modify C# scripts and instantly deploy those changes to running Unity builds—including live games already in players' hands. No rebuilds, no app store submissions, no player interruptions.

Simple example:

• Change code: Lower shop price from $9.99 to $7.99

• Deploy instantly: Changes go live immediately to running builds

• Players see it now: Updated pricing without app restart or reinstall

Setting up Hot Deploy Engine

1

Open any script you wish to edit

Let's say your script is as below

Copy

/*
 * Basic Unity shop manager with purchase button and $9.99 price display.
 * Handles button clicks and logs purchase events.
 */
 
using UnityEngine;
using UnityEngine.UI;

public class ShopManager : MonoBehaviour
{
    public Button purchaseButton;
    public Text priceText;

    void Start()
    {
        priceText.text = "$9.99";
        purchaseButton.onClick.AddListener(OnPurchaseClick);
    }

    void OnPurchaseClick()
    {
        Debug.Log("Purchase initiated");
        // Process purchase logic
    }
}

Make changes to any C# script in your project using your normal editor (VS Code, Visual Studio, etc.).

What you do: Normal coding workflow—edit, save, continue working

2

Edit Your Script

Hot Deploy Engine monitors your project and detects when scripts are modified.

Copy

/*
 * Enhanced shop manager with discount features.
 * Adds 20% off label, reduces price to $7.99, and includes analytics tracking.
 */

using UnityEngine;
using UnityEngine.UI;

public class ShopManager : MonoBehaviour
{
    public Button purchaseButton;
    public Text priceText;
    public Text discountLabel;

    void Start()
    {
        priceText.text = "$7.99"; // Limited time offer!
        discountLabel.text = "20% OFF!";
        discountLabel.gameObject.SetActive(true);
        purchaseButton.onClick.AddListener(OnPurchaseClick);
    }

    void OnPurchaseClick()
    {
        Debug.Log("Discounted purchase initiated");
        Analytics.TrackEvent("discount_purchase_clicked");
        // Process discounted purchase logic
    }
}

What you see in VS Code:

• File marked as "Modified" in your editor

• Diff view showing exactly what changed (additions, modifications)

• "Changes detected - ready to deploy" status

3

Deploy in Editor with 1 click

Hot Deploy prompts you to deploy changes to connected builds.

What you see:

• "Deploy UI Changes to Staging(iOS)?" dialog

• Choice to deploy now or later

• Clear indication of which build will be updated

4

Live Updates Delivered to Users instantly

Changes are pushed instantly to the running Unity build.

What happens:

• Running game receives update without restart

• Players see changes immediately

• No download, no interruption to gameplay

How Hot Deploy Engine Works

• Dynamic Assembly Injection: Compiles managed code into loadable bytecode and injects it into Unity’s runtime domain.

• Type and Symbol Management: Prevents collisions and ensures new types align cleanly with existing ones.

• State Preservation: Updates logic while preserving current game state and memory.

• Cross‑Platform Runtime: Provides consistent APIs across Windows, macOS, Android, and iOS.