Looks like you can also get the Zork anthology on GOG.com, if that’s more to your liking. These versions are for Windows only, I think?
There was an Lost Treasures of Infocom app for iOS which presumably had the Infocom Zorks on it, but when I look for it now all I find is a bunch of plaintive requests to recompile it for 64-bit systems so it can run on newer versions of iOS, being met with dead silence. This seems fairly typical of how Activision treats the Infocom back catalogue.
The M.I.T. version of Zork is even more original than the Infocom version; the people who would go on to found Infocom first made Zork on an M.I.T. mainframe. When they went to market it for personal computers they had to adapt it to a trilogy because the mainframe game wouldn’t fit. Jimmy Maher of the Digital Antiquarian tells some of that story here [click the adjacent posts for more of the story!) Also I may not have all the details right there.
I don’t think you’ll encounter similar issues with many other games! Zork is a touchstone so many people have had their hand at porting it into various languages. If you try the original Adventure, though, there are something like countless versions of it.