I love pre-expansion patches.
You can see most of the coding for an EP in it.
A note about the Kraken, the base chance of an attack is 1%, which can be bumped up to 4% depending on conditions (heavy rain, kraken swimming by and distance from an island). Looks like EA originally programmed it fairly high (5% base chance, etc), so it's nice to see a smaller chance. The boat will not be attacked if it's not been idling too long.
Similarly, there is a 5% chance of a Shark Attack happening. Every raw werewolf edible ingredient (I'm not sure what they are, probably steaks and such) in your inventory increases this chance by 2%. If you're watching a shark, astonishingly, the chance goes way up - by 20%. So a Sim watching a Shark who has a Steak in their inventory has a (5+2+20) 27% chance of being attacked.