This is a map pack for DEAD. Additionally, there will be a full remake coming to the game and 8 new maps, for now it is simply available to purchase but no content is added. It will be re-added in December of 2025 as the maps, the game, and the engine became broken with one GameMaker update. Future games will NOT be using GameMaker, most likely Godot. This entire game is code-based and they continue to change the way code works.. it's code.. why are we changing it. So, blame YoYo games and OperaGX for ruining a 20 year old product. 

Rant aside, the content will be re-added and to be clear it is not in the game anymore at the moment but WILL in December of 2025 as well as a general game overhaul so everything gets back in order. 

Because you are probably also a player of this game and wanted to buy this but now realize it's nothing (for now), here is a sneak peak of what QUAD will look like remade: