File Extension NPG File Format NextPlay game data NPG stands for NextPlay game data. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Salespeople are sharks and other truths of negotiation Salespeople are sharks and other truths of negotiation Kindle games & apps what "permissions" are dangerous?