Overview

100% has not yet been run as of this writing. However, one theory of 100% would be to take Any% and add:

1. Get all four marks for all four party members
2. Get the Silver and Gold Picks
3. Get the Mystic Armor and Weapon for all four party members

An argument could be made for buying up all stats for all party members, or at least buying up max INT/WIS for spellcasters.

One could also say that speaking to the Time Lord is mandatory.

The Golden Pick should be gotten while at Level 1. On the NES Version the Silver Pick should probably be gotten at level 1, as well. The Mystic items would have to be gotten after getting the ship. To get one of each for each party member, pass the pick from party member to party member, allowing each to take a turn digging with it.