Making a Hacked Client

Hey guys! Since I won't be doing anything productive with my time, I decided to make a tutorial on how to make your own Terraria hacked client :) So, let's get started.

Set up

**HIGHLY RECOMMENDED**: Some basic knowledge of C#. If you end up copy and pasting the code, you won't learn anything new.

Visual Studio: This is the IDE that I will be using in this tutorial. While others exist, this is what I recommend for .NET code.

A copy of the decompiled Terraria: You can try to decompile Terraria by yourself using various tools such as ILSpy or dotPeek. But for the sake of simplicity, we will be using a pre-existing source by MPGH user Xenoxiluna found here (Thank you!!!)

Preparing the client

1. So after downloading the decompiled source, make a new folder and extract the files from the source into the folder.

2. Then, open up Visual Studio (or the IDE of your choice) and press File>Open Project/Solution> and select the Terraria.csproj.

2a. I highly recommend that you poke around the source code and see how things function.

3. After a while, Visual Studio (refered to as VS from now on) should display a list of folders to the right. Let's create our own "hack" class for better organization. Right click the Terraria project, and press Add>New Class. I'll call our new class Hacks.cs but you can call it whatever you want.

4. Navigate to Terraria>SocialAPI and comment out everything in the LoadSteam() method. This lets us run our client directly without connecting to steam.

5. Now try to build and run your project. If you get an error with something along the lines of "cannot locate /.xnb", download the Content folder attached and move it to your "FolderName"/bin/Debug.

6. And now we can start the fun part of the tutorial, making hacks!

Basic toggle hacks

Before we actually begin, we have to have a way for our client to communicate with the hacks. For this, we'll have our client listen to all messages we send, and if it begins with a "~", we'll stop it from going to the server and interpret it. To do this, we'll add a "hook" to our chat.

Toggling hacks on and off

Let's make a dictionary for our hacks that stores the state of the hack. Add this to the top of your Hacks class.

Code:

public static Dictionary<String, bool> HackStates = new Dictionary<String, bool>()
{
    {"Godmode", false},
    {"InfiniteMana", false }
};

To handle the toggling of these hacks, let's make another method within our Hacks class called "Toggle" that recieves a string of the Hack name, toggles it to the other state, and echos a message to our client.

Code:

public static void Toggle(String hack)
{
    //Toggles the hack
    HackStates[hack] = !HackStates[hack];
    //Writes a new message to the text box of our client, string represents the message, and the number represents the RGB value of the color. Only you can see this message.
    Main.NewText("[MPGH Tutorial Client] Set the hack state of " + hack + " to "HackStates[hack], 255, 0, 0);
}

Now that we have that, we can go back to our onChat method and implement the toggle method like so:

Code:

if (message.StartsWith("~"))
{
    if (message.StartsWith("~god"))
    {
        Toggle("Godmode");
    }
    else if (message.StartsWith("~infmana"))
    {
        Toggle("InfiniteMana");
    }
...
}

Now that we can control the state of our hacks, let's have them impact our game.

Putting the hacks in action!

So again, I highly recommend that you look through the code and try to find these methods by yourself, but if you're lazy, read on! Let's first implement our godmode hack.

Infinite Mana

Okay, I am going to complicate things a bit in order to make it easier to add more hacks in the future. Let's find our player's Update() method, which is frequently called and add our own hook onto it. At around lines 15652 in the Terraria>Player.cs class, you should find something that looks like this:

Code:

public void Update(int i)
{
	if (this.launcherWait > 0)
	{
		this.launcherWait--;
	}
...

Let's create a method in our Hacks class called onUpdate() and call it whenever the player Update() is called.

Code:

//In player.cs
public void Update(int i)
{
	Hacks.onUpdate()
	if (this.launcherWait > 0)
	{
		this.launcherWait--;
	}
...
}
//In Hacks.cs
public static void onUpdate()
{
    if (HackStates["InfiniteMana"])
    {
        Main.player[Main.myPlayer].statMana = Main.player[Main.myPlayer].statManaMax; //Set our current mana to our max mana
    }
}

This will be a bit short in order to guage interest in these tutorials. If you want to see more, leave a comment with suggestions or feedback, thanks!

Originally Posted by Qiu233

Perhaps you're right.But recompiling code in dnspy or other decompilers always bothers me.What's worse,sometimes even it doesn't work,only can I do is to change my idea.If source code was obtained,problems can be solved once and for all.

Sorry that it was until just now that I found this is such an old thread...

Old but still informational, helpful for those who are new.

Originally Posted by SmellyMelly

ah thank you guys.
i got a question,
how people make those 1.3.5.3 hacked clients without source code?
i heard about putting your own codes in terraria patcher and patch it,
is there any other way?
sorry for my amateuristic questions :P

I made the Crimson Client with dnSpy.
I'm not 100% open to helping randoms out in creating a client but I can offer some help if needed. Just pick your choice of communication other than here.

Making a Hacked Client

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