File Extension TP4 File Format Saved picture file (Roller Coaster Tycoon) TP4 stands for Saved picture file (Roller Coaster Tycoon). 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 E-Views: Riding the roller coaster to recession Ariba to change operating model Will stock market instability incite IT strain?