The DVM DLL Metal Slug on PC is not an official release by SNK, but rather a community-driven project aimed at bringing the game to a new audience. The game's developers have worked tirelessly to ensure that the gameplay, graphics, and soundtracks are faithful to the original, while also adding some modern touches to make the game more accessible to new players.
: The most reliable way to restore a missing system file is a clean reinstall of the game. If you are using a platform like Steam, use the Verify Integrity of Game Files tool to automatically detect and redownload the missing DLL. dvm dll metal slug pc new