Metal Slug 6
Official versions of are generally not compatible with the 0.139u1 (MAME 2010) romset . While earlier Metal Slug games (1 through 5) run on Neo Geo hardware, Metal Slug 6 was built for the Sammy Atomiswave system, which was not supported in the 0.139u1 release of MAME. Compatibility Overview
mobile emulation
The "0.139u1" designation refers to a specific version of the MAME (Multiple Arcade Machine Emulator) romset. This version is particularly popular for because emulators like MAME4droid 0.139u1 are optimized for performance on older or lower-powered hardware. Compatibility Challenges
2. MAME 0.139u1
Unlike modern MAME, 0.139u1 has very stable save states for Atomiswave. Hit Shift+F7 to save and F7 to load. This bypasses the game’s limited continue system, letting you practice mission 5 (the sandstorm section) repeatedly.
- Driver Stability: By version 0.139, MAME developers had significantly matured the Atomiswave (sega/aw.cpp) driver.
- File Hashing: MAME is strictly cyclical. If a ROM is renamed or a file size changes in version 0.200, it will no longer work in version 0.139u1. The "top" ROM set for this version refers to the specific file checksums (CRC32, MD5, SHA1) recognized by the emulator core at that specific point in time.

