You can play Fortnite for free via the Epic Games Store, or from the official Fortnite website. Fortnite never gets boring with its constant updates and changes. You can always find new modes, weapons, items, and map features. If you stop playing Fortnite for a while, you'll be surprised by how much it has changed. For this alone, it's definitely worth giving a shot as there is so much to do.

OS: Windows 10 
Processor: AMD Ryzen 3 2200G, Intel Core i3-3225
Memory: 8 GB RAM
Graphics: AMD Radeon Vega 8, Intel HD 4000
Storage: 20GB Avaliable Space

OS: Windows 10/11 
Processor: AMD Ryzen 3 3300U, Intel i5-7300U
Memory: 16 GB RAM
Graphics: AMD Radeon R9 290, NVIDIA GeForce GTX 960
Storage: 60GB Avaliable SSD Space

Fortnite removed building in Battle Royale for a week as part of a new update. The game's story said it was because of the villains' of the game interfering with players' abilities.
On March 29, 2023, the building was reinstated in Battle Royal, and a new mode called Zero Build was launched where the building was turned off. 

Fortnite Save the World is a mode in Fortnite where you can fight and build. You have to defend yourself from waves of monsters and explore a huge and breakable world. You can also make big forts, craft weapons, find loot, and level up!