Windows/Mac/Linux (All platforms): Do you harbor nostalgia-tinged memories of autoexec.bat files? Does the phrase "Soundblaster-compatible" mean anything to you? Dig out those floppies and try out DOSBox, a free, open-source DOS emulator for all platforms. The app supports at least 3,000 games, and likely many more, as it can recreate most graphics and sound setups, and lets you set your own processor speed to prevent the warp-speed effect games often suffer on modern systems. DOSBox is a free download for Window, Mac, Linux, and other platforms.