sgoshe: The way SS2 was protected for so many years, I think SS1 portable download would be shut down pretty quickly if the owners didn't want it out there.
Just my opinion. Makes me think it is truly abandonware.
THere is no such thing as 'truly abandonware'. Abandonware is never legal. It would take something like 70+ years for a game to become 'public domain'.
Now, there is 'freeware' in which a company makes the game free to the public, legally. It is very important to find out if that was ever the case.
https://en.wikipedia.org/wiki/List_of_freeware_video_games Then there "opensource' in which the game itself may not be freeware, but the sourcecode has been opened ot the public by the company. Keep in mind sometimes the sourcecode 'escapes', and is not legally released. That is not 'opensource'.