No-Intro

No-Intro is a group created to preserve clean dumps and fix any ROM dumps that have been altered through intros, trainers, hacks, etc. as well as creating a complete list of all dumped games that were ever released. It gives the European, Japanese, and American variation of the ROMs. No bad dumps, no overdumps, no underdumps, no hacks, no homebrew.

What No-Intro does is fill some dat files, to be used with ROM Managers, with information about the good known ROMs released. Often there are more versions of the same ROM dump, but most of them are garbage, some examples may include: bad dumps, hacks, fakes, overdumps, underdumps, and so on. No-Intro lists only the best available ROM; it must be a full dump with no faults and no changes to the file, basically just the ROMs that are the closest as possible to the original licensed cartridges.