A certain file used by the DOOM engine. LikeSonic Robo Blast 2, Heretic, DooM 2, and others. It helps to make such things as characters, or levels. SOC files can be used as for the engine, too.
<Kairo> I will make a WADfile that includes a character skin.
<Gloom> NO WAI! How do you make one???1!!11
<Kairo> Easy. Use XWE. It's a simple WAD maker.