File Extension PCG File Format Graphics file PCG stands for Graphics file. 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 What is the difference between NVIDIA Graphics and Integrated Graphics? Sony Viao PCG-3A1L CMOS battery How does EPS differ from other graphic formats?