Limited - Free key used for tests and pre-production purposes. You won't be charged anything using that key in a pre-prod environment. Note that with a Limited key, the number of User-Generated Emote you can create is limited, to avoid issues.
Unlimited - Free key used for production purposes. Access to the key is free but depending on your usage you might be charged based on our pricing policy. To obtain an Unlimited key, head to your dashboard on the Developer Portal, and click on "Upgrade to Unlimited", in the "Monitoring" section.
To request an authentification Game API Key on the Developer Portal, you need to have a game space created. If you do not already have a game space created, head to your dashboard, and create your game space by clicking on "Create a game".
Then, click on the "Get API key" button, below "Activate your Game/App API Key.
Copy and save your Game API Key. You will have to use it soon!
CAUTION: your Game API Key will be displayed only once. It is crucial that you copy and save it before closing the pop-up, otherwise you will have to restart the process!