This is the heart of Maniac Mansion Mania where you can find all the games.
The episodes are the heart of Maniac Mansion Mania and so they are the biggest part of all the games.
The specials are miniseries about special topics where many of the normal rules take no effect.
The underground section covers trash episodes, radio plays and experiments which are not conform to the standards of a regular MMM-episode, but still be part of the MMM-universe.
The fanadventure section is a selection of games in old LA-tradition.