Sports ports are the most likely to ask for your own data, because the original games shipped with licensed asset libraries that cannot be redistributed: Skate 3 streams from a converted copy you make yourself, and PES 6 documents keyboard, gamepad and touch controls. Not everything here works that way. 1080° Snowboarding is a clean-room N64 build that regenerates its own textures, and International Sensible Soccer is the 1994 DOS game running in a browser DOS environment with nothing to supply. Read the requirement badge first, because it varies more in this group than in any other.