First, download the official MAME software from its official website or other reputable sources. Ensure you're getting it from a trusted source to avoid malware.
Finding a specific bundle like "Mame X Pakistani with 600 Games" usually refers to a pre-configured version of the MAME (Multiple Arcade Machine Emulator)
The primary driver for the popularity of such downloads is convenience. For a retro gaming enthusiast, building a library legally requires sourcing individual circuit boards, which can be expensive, fragile, and require significant space. Alternatively, tracking down 600 individual ROM files from disparate corners of the internet can be time-consuming.