It was requested to provide a list of changes and additions I made to the game.
Here are the basics that I can think of at the moment.
Magic-User establishing a tower at 10th level
Better attack damage for some big monsters like golems and dragons, etc
Adventuring Rules; like torches, finding secret doors, etc.
Underworld monster stocking tables
Wilderness Transportation Movement Rates
Reaction roll table
Modfied the Sleep spell, like victims HD
Other small changes here and there, for example; with Clerics I changed the reason for only being
allowed blunt weapons to secret religious practices rather than being forbidden to shed blood.