Decompiled and commented code from Oregon Trail II. This is decompiled C++ from the executable; I would be very surprised if it compiled, this is purely for data diving/reverse engineering purposes.
Decompilation from Snowman: https://github.com/yegord/snowman/
To view data in a more legible format: https://docs.google.com/spreadsheets/d/1lJlZA0BBIAZVAxEuniHffpb3K18b27j4LeYaTmV1dX8/edit?usp=sharing