The Fellowship Edition (2002)
Painting Masterclasses
Sauron
Beginner's Painting
Legolas and Gimli
The Last Alliance
Escape from Orthanc
the Hobbits
Aragorn and Boromir
Lurtz
Cave Troll
Evolution of the Ringwraiths
The Balrog
MiscRules: Sauron (outdated in latest rulebook)
Designer's Notes
Battle ReportsOrcs Attack
Ambush at Amon Hen
Escape from Balin's Tomb
Scenery WorkshopBuilding a Gaming Board
Building Balin's Tomb
The Bridge of Khazad Dum
Building Amon Hen
Scenarios: Amush at Amon Hen (2 part)
The Two Towers edition (2003)Painting MasterclassesHeroes of Helm's Deep: Aragorn, Théoden, Gamling, Gimli, Legolas and Éowyn. Also the Elven banner, but no guide for the elves or Haldir themselves.
Treebeard
Balin and Durbûrz
Modelling/conversions/terrainDaren Parrwood's Light-up Balrog
Modelling Workshop: Banners
Ent conversion guide
Helm's Deep, not exactly a guide but a description how GW staff built it.
Building the Watcher of Water and the Walls of Moria (the area around the Watcher's Lake)
Scenarios and mini-gamesScenario design guide
Faramir's Escape: Scenario, Faramir's rangers vs. Orcs
They're Here: Scenario, Ringwraith on Fell Beast and Orcs vs. Faramir's men in Osgiliath.
Don't Disturb the Water...: Scenario, Fellowship vs. Watcher
Duel on Zirak-Zigil: Gandalf vs. Balrog mini-game
Race to Bruinen Ford: Arwen flees from Ringwraiths in a mini-game
Wizards' Duel: Gandalf vs. Saruman mini-game
Battle ReportsWrath of Rohan: Eomer and Riders vs. Ugluk's team
Deeping Wall and Defend the Gateway: The TT rulebook scenarios depicting the siege of Helm's Deep.
Battle for the Dwarrowdelf: Balin and Dwarves vs. Goblins
Watcher in the Water: Fellowship vs. Watcher
RulesDifferent Ent species
Ringwraiths (no Witch-King). The same as in RotK rulebook.
Misc stuffDesigner's Notes: Two Towers and Shadow&Flame
Fellowship of the Ring Rules Clarifications
Golden Demon 2002 winners
OutdatedRohan Royal Guard Rules (outdated, current ones in RotK rulebook)
The Return of the King edition (2004)New TroopsEagles: Landroval and Meneldor
Ents (same as in the TT edition)
Elnaith
Siege Bows for Easterlings and Mordor Uruk-Hai
Mirkwood Elves
Gondor Fiefdom Warriors (The Beacons are Lit)
New Orc troops (Legions of the Eye)
Area RulesThese are area-specific rules for playing games in different parts of Middle-earth.
River assaultsRiver Assault Rules, a newer version of these has been published in WD.
Scenario: Escape on the Water, WoMT vs. Orcs on river
Building boats
GamingRules of Engagement: Tournament Rules
Muster of Middle-earth: Guide to theming forces
ScenariosShe Hunts: Shelob vs. Orcs
Ride of the Ringwraiths Campaign, five linked scenarios: Osgiliath, The Gap of Rohan, Slaughter at Sarn Ford, Amon Sûl and Ford of Bruinen.
They're Here (again): Ringwraith and Orcs vs. Faramir's troops in Osgiliath. Same as in the TT edition.
Still Don't Disturb the Water: Watcher of Water vs. Fellowship, same as in the TT edition.
Sands of Kârna: WoMT vs. Haradrim
The Red Arrow: Hirgon sneaks past orcs
Faramir's Escape Campaign, three linked scenarios: Faramir's Escape, Damrod's Gambit and In the Shadow of Osgiliath.
Thanks for Gollum Rules for the contents of the first compilation.
-- Pasi