The Masters series of adventures were created for the BECMI version of D&D. Typically around here I have BECMI as roughly synonymous with B/X D&D or "Basic D&D" well....the M or Master Series is around to remind me that this is not really the case.
So a bit history.
The first Basic Set was authored by John Eric Holmes in 1977. Gamers often call this "Blue Book Basic".
The next Basic Set was written by Tom Moldvay and was followed by the Cook/Marsh Expert Set. These books are collectively known as B/X.
The next set would be the last "Basic D&D". It was written and edited by +Frank Mentzer and included the Basic, Expert, Companion, Masters and Immortal sets. Also known as BECMI.
Each set detailed more levels of the game; 1-3, 4-14, 15-25, 26-36, and Immortality, respectively.
The Masters set and M series of modules were designed for experienced players and characters of 26th level and higher.
Only five M series modules were made.
|M1||Into the Maelstrom||25–30||Bruce Heard, Beatrice Heard||1985|
|M2||Vengeance of Alphaks||28–32||Skip Williams||1986|
|M3||Twilight Calling||30–35||Tom Moldvay||1986|
|M4||Five Coins for a Kingdom||28–32||Allen Varney||1987|
|M5||Talons of Night||20–25||Jannell Jaquays||1987|
Of these I only own M1, M3 and M5.
The simple matter is few characters get to this high of a level and often when they do the DM usually has their own adventures for them.
M1 Into the Maelstrom is a cool adventure with flying ships which became some of a fasination for +Bruce Heard. If I were to play this one I would naturally have to include material from Bruce's own Calidar, In Stranger Skies setting. Or set it in Calidar...hmmm this gives me some ideas.
M3 Twilight Calling is from the creative mind of the late Tom Moldvay. Tom is something of a celebertiy in my home games. Every adventure I have run of his my family likes. Likes enough to ask who wrote it. After saying Tom Moldvay for the third time (Castle Amber, Isle of Dread, Lost City, Secret of the Slavers Stockade...). It is my favorite M series module and has the players go on a plane-hopping adventure to finally get to the Plane of Nightmares. I have often thought it would make for a perfect "Final Adventure" for any party.
M5 Talons of Night by Jannell Jaquays is also fun, and really deadly adventure. I grabbed it becuase of the dragon on the cover. If M3 is the finale for my "Come Endless Darkness" game then M5 should be the finale of my "Dragonslayers" game.
Plus, it always reminds me of this song.
I mentioned H4 with it's 18-100 level range, and it is deadly. But that adventure is just really a scaled up 20th level adventure. These adventures are qualitatively different.
I am just disappointed that they are not available yet on DriveThruRPG as PDFs, though I am glad I have mine.