If it hasn’t been updated, it’s ceased to be usable. A Flash in the PanĪ lot of Flash-based content has either already been updated to use a modern standard like HTML5, WebGL, or Unity. If something isn’t on their list of content, you can always contribute to the community and add it yourself. Thousands of games and animations have now been catalogued and are available for you to download and play as you like, so chances are good that you won’t even need to go manually back up the game you were afraid would disappear.