Will deregistering a kindle fire make you lose games?

Deregistering a Kindle Fire will remove your Amazon account from the device, which means you will lose access to any purchased content linked to that account, including games. However, if the games are installed on the device and were downloaded through the Amazon Appstore, you can still play them offline without an account. To retain your game progress and purchases, make sure to back up your data or link the games to an account that supports cloud saves.