KeepDrive – Infinite Scroller Game (Unity – Admob)

Introduction

Welcome to the KeepDrive - Infinite Scroller Game tutorial for Unity and AdMob. In this tutorial, we will guide you through the process of creating a complete game using Unity and AdMob, a popular mobile advertising platform. The game we will be creating is called KeepDrive, an infinite scroller game where players must keep their character's car on the road as long as possible by tilting their device left and right.

Step 1: Setting up Unity and AdMob

To start, you will need to have Unity installed on your computer. If you don't have Unity, you can download it from the official Unity website. Once you have Unity installed, create a new project by selecting "3D" as the game type and "Empty Project" as the template.

Next, you will need to set up AdMob in your Unity project. To do this, follow these steps:

1. Go to the AdMob website and create a new ad unit.
2. Select "Mobile App" as the ad format and "Reward Video" as the ad type.
3. Click "Create Ad Unit" to create the ad unit.
4. In your Unity project, go to "Window" > "Google Mobile Ads" and sign in with your AdMob account.
5. Create a new ad unit by clicking on the "Create Ad Unit" button.
6. Configure the ad unit settings to match your AdMob settings.

Step 2: Creating the Game Scenes

In this step, we will create the different scenes for our game.

1. Create a new scene by going to "File" > "New Scene" and selecting "3D" as the scene type.
2. Name the scene "GameScene".
3. Create a new scene by going to "File" > "New Scene" and selecting "3D" as the scene type.
4. Name the scene "TitleScene".
5. Create a new scene by going to "File" > "New Scene" and selecting "3D" as the scene type.
6. Name the scene "GameOverScene".

Step 3: Creating the Game Objects

In this step, we will create the game objects that will make up our game.

1. Create a new game object by going to "GameObject" > "3D Object" > "Cube".
2. Name the game object "Car".
3. Create a new game object by going to "GameObject" > "3D Object" > "Sphere".
4. Name the game object "Obstacle".
5. Create a new game object by going to "GameObject" > "3D Object" > "Plane".
6. Name the game object "Road".

Step 4: Adding the Game Logic

In this step, we will add the game logic to our game.

1. In the "GameScene", add a script to the "Car" game object by going to "Component" > "Scripts" > "C# Script".
2. Name the script "CarController".
3. In the "CarController" script, add the following code:

using UnityEngine;

public class CarController : MonoBehaviour
{
    public float speed = 10.0f;
    public float rotationSpeed = 100.0f;

    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    void Update()
    {
        float horizontalInput = Input.GetAxis("Horizontal");
        float verticalInput = Input.GetAxis("Vertical");

        rb.AddForce(new Vector3(horizontalInput, 0, verticalInput) * speed);

        float rotation = Input.GetAxis("Mouse X") * rotationSpeed;
        transform.Rotate(new Vector3(0, rotation, 0));
    }
}

1. In the "GameScene", add a script to the "Obstacle" game object by going to "Component" > "Scripts" > "C# Script".
2. Name the script "ObstacleController".
3. In the "ObstacleController" script, add the following code:

using UnityEngine;

public class ObstacleController : MonoBehaviour
{
    public float speed = 5.0f;

    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    void Update()
    {
        rb.velocity = new Vector3(speed, 0, 0);
    }
}

1. In the "GameScene", add a script to the "Road" game object by going to "Component" > "Scripts" > "C# Script".
2. Name the script "RoadController".
3. In the "RoadController" script, add the following code:

using UnityEngine;

public class RoadController : MonoBehaviour
{
    public float speed = 10.0f;

    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    void Update()
    {
        rb.velocity = new Vector3(speed, 0, 0);
    }
}

Step 5: Adding the AdMob Ads

In this step, we will add the AdMob ads to our game.

1. In the "GameScene", add a script to the "Canvas" game object by going to "Component" > "Scripts" > "C# Script".
2. Name the script "AdMobController".
3. In the "AdMobController" script, add the following code:

using UnityEngine;
using Google.MobileAds;

public class AdMobController : MonoBehaviour
{
    private RewardBasedVideoAd rewardBasedVideoAd;

    void Start()
    {
        MobileAds.Initialize(initStatus => { });

        rewardBasedVideoAd = RewardBasedVideoAd.Instance;
        rewardBasedVideoAd.LoadAd(
            RewardType.Video,
            "ca-app-pub-3940256099942544/522830691");
    }

    public void ShowRewardBasedVideoAd()
    {
        rewardBasedVideoAd.Show();
    }
}

1. In the "AdMobController" script, create a button to show the ad by going to "GameObject" > "UI" > "Button" and naming it "Show Ad".
2. In the "Show Ad" button, add a script to the button by going to "Component" > "Scripts" > "C# Script".
3. Name the script "ShowAdButton".
4. In the "ShowAdButton" script, add the following code:

using UnityEngine;

public class ShowAdButton : MonoBehaviour
{
    public AdMobController adMobController;

    public void ShowAd()
    {
        adMobController.ShowRewardBasedVideoAd();
    }
}

Step 6: Testing the Game

In this step, we will test our game to make sure everything is working correctly.

1. Build and run the game on your device or simulator.
2. Play the game and make sure the car moves and the obstacles appear.
3. Check that the ad is showing correctly when you tap the "Show Ad" button.

Conclusion

Congratulations! You have now created a complete game using Unity and AdMob. With this tutorial, you have learned how to create an infinite scroller game with AdMob ads.