pre:

Main changes
• You are no longer trying to kill Morgoth
    • The aim is now to free a Silmaril from Morgoth’s crown, then escape
• The game is much shorter
    • Morgoth is found at 1,000 ft
    • A winning game should take about 10 hours
• There is no town or word of recall5
• It has a much more coherent theme: The First Age of Middle Earth
• There are no classes, or experience levels
    • Instead there are 8 skills to improve
    • With a tree of special abilities for each
• The combat system is completely new
    • It is very thoroughly thought out and tested
    • It leads to many more interesting choices for the player
• Monster AI is much better
    • It uses 4GAI, plus numerous improvements
• The monsters, items, artefacts and almost completely rewritten
• There is much less explicit magic
    • e.g. no fireballs, no teleportation…
• There is more tactical depth in combat
    • Partly due to the absence of teleportation and other easy escapes
• There is an effective time limit
    • Over time you can no longer find your way to the shallower depths
    • You can thus play each level more than once, but not indefinitely
System changes
• Stats
    • Based around the average for the Men of the first age (set as 0)
    • There are no ‘stat potions’, so initial stats matter a lot more
    • Int/Wis/Cha are replaced with Grace
• Hit points don’t go up with experience
    • They are solely based on your Constitution
    • You die at 0 (instead of –1 in Angband)
• Elements
    • There are only four elemental attacks (fire, cold, poison, dark)
    • Resistances stack, reducing damage to ½, then ⅓, then ¼, …
    • Dark resistance is determined by your light level 
    • Poison does no direct damage, but damages over time
• Speed is much less fine grained and less available
    • The only speeds are 1, 2, 3, 4
    • normal speed is 2, so +1 speed makes you move 50% faster
• The only ‘pseudo id’ is {special}, which covers artefacts and ‘ego-items’
• You can only tunnel with shovels and mattocks