Chris Sawyer's (designer and developer behind Transport Tycoon) FAQ wrote:I can't find Transport Tycoon available to buy - Can I just download it?
No! All versions of Transport Tycoon are protected by copyright, and are the subject of a publication agreement with Microprose, which means the only legal way to obtain the game (and support the developer) is to purchase the full boxed product. If you can't find it in your country, you can usually purchase by mail order from another country - See Games/Purchasing for more details.
Just because old games can readily be found for download does not mean that they are legal downloads. Very few of the Sierra games have been freewared, but almost all Sierra games can be readily found on "abandonware" sites. Even copyrights originally held by companies that no longer exist are usually held by some other entity that acquired the assets of said company. In Sierra's case, Activision.
There are a few other threads here where the subject of abandonware has come up. You can search for them if you wish to see more info about it. In principal I am sympathetic with the concept of abandonware, but that does not change the legal status. I do not want this site to become associated with abandonware. The policy here is that discussion of abandonware is not prohibited, but please, do not post links to abandonware or abandonware sites. If we are ever wrong and a game can be shown to have been freewared, the links can be restored.