Make a 2D Space Shooter Game: Asteroid Ambush in Unity (Tutorial)

Published in

echo3D

4 min readJul 11, 2022

For quick art changes that need to be swapped out quickly across platforms for updates, echo3D makes it easy to do this by simply using an API key. Assets are stored on the echo3D cloud and called at runtime.

In this tutorial, you will import asteroids and planets as the obstacles in Asteroid Ambush!

Click this link https://go.echo3d.co/c3nA or scan this QR code to see something out of this world 🪐.

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Version

Unity 2020.3.25f1

Setup

Clone this repo, see the full README
Import the Unity SDK
Add the assets to the echo3D console from the Unity ‘Models’ folder
Uncheck the Security box in your console
In Unity, open the Game scene
Drag the echo3D script onto the Planet 1–3 and Asteroid 1–3 objects in the Hierarchy
Add the API key and entry ID for each object in the Inspector

In the Hierarchy, make sure to the boxes are unchecked for the Sprite Renderer for Planet 1–3 and Asteroid 1–3
Press Play in Unity to see where the 3 assets show up in the scene so you can modify the metadata in the console
Adjust the metadata in the echo3D console as follows so the assets appear within the colliders. These may work for you:
Asteroid 1: scale: .02, yAngle: 180, xAngle: 90, x: -1.7, y: 3.6
Asteroid 2: scale: .02, yAngle: 180, xAngle: 90, x: 2, y: 2
Asteroid 3: scale: .02, yAngle: 180, xAngle: 90, x: .9, y: -1.2
Planet 1: scale: .02, yAngle: 180, xAngle: 90, y:3
Planet 2: scale: .02, yAngle: 180, xAngle: 90, y: -3.5, x: 1.5
Planet 3: scale: .02, yAngle: 180, xAngle: 90, y: -3.5, x: -1.5

Run

Press Play in Unity and click in the Game window to change the rocket’s direction. Hit the 3 asteroids to save the galaxy! If you hit the planets, the game will restart. Control rocket with your mouse click.