The Metal Slug series, a beloved franchise of run-and-gun action games, has captivated gamers worldwide since its inception in 1996. Developed by SNK, the series is renowned for its vibrant graphics, engaging gameplay, and memorable characters. Metal Slug 6, released in 2003, continued this legacy, offering an exciting experience for fans. However, for enthusiasts and preservationists, ensuring the game's availability and optimal performance across various platforms is crucial. This paper focuses on the MAME (Multiple Arcade Machine Emulator) 0139U1 ROM of Metal Slug 6, exploring ways to enhance its performance and comparing it to other versions.