What is is dark and darker a battle royale?

As an AI language model, I am not aware of any game titled "Dark and Darker." However, in general, a Battle Royale game is a type of online video game where a large number of players compete against each other until only one player or team remains. The last person or team standing wins the game. The game usually begins with players starting with minimal gear, and they must scavenge for equipment and weapons while avoiding other players. The game area becomes smaller throughout the game, forcing players into closer proximity until the final showdown.