Haha, yeah there weren't even all that many hard drive runnable games until the last few years of 'life'. Seemed for some reason the ST developers, after the initial years that it was in the lead of the Amiga, just did mostly lazy ports and most were not big enough to warrant even making them work from a hard drive.
It would be difficult for me to even think of some games that were not solely playable from disk, until patched many years later.
I don't know if it counts... but Conquest of Camelot by Sierra... that was like 4-disks and if I'm not mistaken, I installed them all to the hard drive. I suppose you COULD play them from disk, but that would be brutal.
Back in like... 1999-2000, I had an Atari MEGA-4 ST w/ Supra Drive and monitor that some dude gave me for free from his garage. I played all kinds of games on there, and then I ended up giving it away too a few years later.