Q: Are MAME 0.159u2 ROMs free? A: MAME 0.159u2 ROMs are generally free to download and use, but some ROMs may require specific permissions or licenses.
Many users have large, curated ROM collections that were complete around 2015. Upgrading to modern MAME (e.g., version 0.270) would require renaming, re-adding, or removing hundreds of ROMs due to changes in naming conventions, merged/parent/clone sets, and improved dumps. Running MAME 0.159u2 allows those users to play their existing collection without modification.
