The original intro for Serpent Isle weighted about 8 Mbs, which while laughable by today's standards was a hell of a lot of space to put into floppy disks. Thus, the producers replaced the original intro (which featured more close shots of the avatar's ship as it made it's way through the waters as well as showing the serpent pillars rising up from the sea) with an animation composed mostly of long, static shots in order to preserve space.
Run install.exe, the setup program that is installed in the game's directory and select NO SOUND CARD.
Find the bridge that is east of the Spinebreaker Mountains magic carpet chamber, and in the vicinity you will see a plaque.
Go to the coordinates 77S 28W in the forested area southwest of the city of Fawn.
In the Lost City, you meet a gargoyle who tells you: "To be known as Zhelkas. To mean 'Iron 'Helm'". Zhelkas' parents must have been of Slavic origin - Zhelelznaya kaska is indeed "Iron Helm"... in Russian.
"Serpent Isle" has a very funny copy protection. If you give wrong answers to Thoxa and to Fedabiblio, all the characters in the game will talk nonsense every time you speak to them. You'll still be able to wander around the game world, but all the conversation will be amusingly absurd. Occasionally, the characters will also shout "Oink!" when you are not talking to them.
This is by far the sexiest Ultima game - it contains several sex scenes featuring - yes, you heard right - full nudity! Of course, the character sprites are so small that you can't see much, but nevertheless the scene with the sorceress Frigidazzi is quite... ahem... impressive. What's more, you'll have this scene even if you are playing a female Avatar (*gasp!*)!
Despite the loss of the source code, some dedicated fans of Ultima VII and VII Part Two are in the process of reverse-engineering the games under the GPL license! See Links/Searches for more details.
Origin neglected to preserve the source code from both Serpent Isle and Silver Seed, and it is now lost, meaning the game can't be modified for re-release on future PC platforms.