The 10 coolest and weirdest Doom mods ever

Doom. A crusty old shooter with a dull modern sequel, or something more? The answer is a lot more. With a passion for user-generated content even way back in 1993, iD's John Carmack deliberately designed Doom to be easily editable for players. Level and graphic data was stored in WAD (Where'a All the Data?) files separate from the main engine, meaning that with a bit of knowledge, anyone could learn