Where can you download Metal Slug

FOR PC: First, you have to download a ps1 emulator, next you extract to desktop, make a folder, and move all the files into the folder you created. Then, you have to download the bios and images for the games. After that, you download the "Metal Slug X" iso. Downloading the iso will allow you to run and play the game. Lastly, you extract the game and put those files in the same folder. In order to play the game, you must run the emulator you first downloaded. Then you click "File", then "Run Iso" then click "Metal Slug X. bin". Now you can play the game but for the best gameplay, buy a PC "Dual Shock 1" or "Dual Shock 2" game controller.