The mod includes, at levels where there is a laboratory for cooking meth (“Rats”, “Cooking Meth”, “Lab Rats” - Hotline Miami is not included, since there is a separate recipe on the map) instructions that show which ingredient needs to be added next. Optionally, the mod can write the item in the chat (to all players), or display it as a hint on the screen (to the player with the mod).

To work you need BLT Hook.