Setup

Time to get your hands dirty!

The first step is to import the asset into your project. You can do this from the menu Window > Package Manger

Package Manager menu

With the asset imported, locate the SteamManager script, available in the folder Assets > Lucky Raccoon Games > Really Simple Steam Integration > Integrations > 3rd Party and open it in your favorite editor

Change line 99 with your Steam App ID:

Change the code on line 99 as shown above

Don't know what your game's App ID is? You can find it in Steamworks, on the game's settings page (a numerical sequence, right next to the game's name)

In the root folder of your project locate the steam_appid.txt file and open it in your favorite editor. Add in this file your App ID as well and don't forget to save the changes.

The steam_appid.txt file located at your project root folder

The steam_appid.txt file is for the API to work properly in Unity Editor

Warning! Do not include the steam_appid.txt file in your release build

Woohoo! It's all ready for you to get started :)