Download of Paintown 3.6.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Games, more precisely Action. This free software for Mac OS X was originally developed by Jon Rafkind. We recommend checking the downloaded files with any free antivirus.
From the developer:
Paintown is a free and open source 2-d fighting game.
If you are looking for a side-scrolling, action packed game like you used to play or if you are looking for an extensible engine to write your own game, look no further. Paintown supports user created content through a mod system and user defined functionality through scripting.
Paintown also supports an implementation of M.U.G.E.N. Our goal is to be 100% compatible with M.U.G.E.
You may want to check out more Mac applications, such as Wolfenstein ET, Duke Nukem 3D or Doom 3, which might be related to Paintown.