Several platforms rely on this specific set for stable performance: MAME4droid (0.139u1)
: The official Google Play Store page notes that this version is specifically designed for dual-core devices and higher.
You're looking for ROMs for MAME (Multiple Arcade Machine Emulator) version 0.139u1. MAME is an emulator that allows you to play classic arcade games on your computer, and it requires ROMs (read-only memory images) of the games to function.
yoshisuga/MAME4iOS: Multiple Arcade Machine Emulator ... - GitHub