Things You'll Need
Instructions
Choose a Dreamcast emulator such as Chankast, one of the more popular options. Many game emulators can be downloaded from the Internet.
Extract the emulator files on your computer and install them on your system. The emulator will simulate the Dreamcast console on your computer.
Search for ROM files, which are essentially copies of game code that typically can be downloaded free for use with the emulator. Try ROM sharing sites like CoolRom.com or EMUParadise.org, or simply use a search engine.
Download the ROM for the game of your choice. File sizes are generally small, rarely taking up more than 30 megabytes.
Open the emulator and select the ROM you downloaded to initiate the game.