I've spent the morning playing Theme Hospital and it's still as good as when I first got it!
I haven't even been cheating... yet! lol
OK, so the graphics aren't 3D or whatever, but that doesn't matter to me! It's addictive and so playable so the graphics don't matter to me!
It is copyrighted 1990-1994 which is another reason the graphics aren't that great but you've improved in the last 20 years just like the graphics on modern-day games have!
Going to have me soup for lunch then play it again to see how far I can get without cheating!