The MAME 0.240 ROM set, released in January 2022, is a significant "Silver Jubilee" milestone marking 25 years of the project . It includes substantial additions to the arcade and software list libraries, particularly focusing on handhelds, prototypes, and rare slot machines. Key Content & Additions
Even though newer sets exist (0.241 through 0.260+ as of 2025), set 0.240 remains a favorite for several reasons:
For those setting up a new system, the MAME 0.240 set offers a vast library of over 10,000 unique entries. From the legendary simplicity of Pac-Man and Donkey Kong to the complex fighting mechanics of Street Fighter III: 3rd Strike, this set acts as a comprehensive museum of gaming history. It ensures that even as original hardware fails and circuit boards decay, the software experience remains accessible for future generations.
A major highlight of this release was adding the remaining versions of the series, making the set nearly complete in MAME. This included rare versions of: Helmet Judge Mario's Cement Factory Additional 0.240 Highlights
