2K Games has put the original Railroad Tycoon online as a free download! It’s part of a promotion for their new game Sid Meier’s Railroads!
After you go to the page, look for the “RAILROADS! DEMO & FREE FULL GAME RAILROADS TYCOON” button near the bottom that says they are now available to download. Once you click that button, you go to the next page, and on your right you can click the full game “DOWNLOAD” button to get your 14MB free game.
The classic game comes with the manual and documentation. Via Joystiq