Fortnite is a free-to-play game, so a "crack" or "full version download" from unofficial sources is unnecessary and often dangerous. To access the game safely and for free, you should use the official channels provided by Epic Games . Official and Safe Ways to Download Fortnite

If your intent was to "develop" or experiment with Fortnite's engine, you should use the official .

The standard way to play on Windows or macOS is through the Epic Games Store .