Completed PBMs:
This list is in rough chronological order by game engine. Earlier PBMs mixed administrative and story posts in a single Write-up Thread. Many PBMs have failed to get off the ground or have been abandoned soon after starting. Only PBMs that have at least one detailed write-up are listed below. TW RPGs are not included in this list, they can be found in the TW RPG Completed Games Archive.
(Thanks to econ21 for creating the PBM list for MTW, MTW VI, RTW, and RTW BI.)
Medieval Total War (MTW)
The Glorious Reigns of the Kings of England: Write-up Thread (First ever Org PBM!)
The Glorious Reigns of the Kings of Poland: Main Thread | Write-up Thread
Poland GA: Write-up Thread
The King of Sicily: Write-up Thread
The Chronicles of the Holy Roman Empire: Main Thread | Write-up Thread
The Kingdom of Aragon: Write-up Thread
Glory of the Tzars - Russia: Write-up Thread
Glorious French Empire GA: Write-up Thread
Emperor of Byzantium: Write-up Thread
Nobody expects the Spanish Inquisition!: Write-up Thread
Are You Hungary for Conquest?: Write-up Thread
The Almohad Khaliphate: Write-up Thread
Rise of the Turkish Sultans: Write-up Thread
The Glorious Masters of Italy: Write-up Thread
The Spanish Reign: Write-up Thread
Egypt: Write-up Thread
Rise of a Spanish Empire: Write-up Thread
The French Dynasty: Admin & Write-up Thread | Dedicated Write-up Thread (incomplete)
A Concise History of England: Write-up Thread
The Glorious Might of Egypt: Main Thread | Write-up Thread (incomplete)
Viking Invasion (MTW VI)
The Almohad Khaliphate (VI Version): Main Thread | Write-up Thread
Fury of the Northmen - Vikings: Write-up Thread
Behold the Mighty Armies of... The Welsh?!: Write-up Thread
Saxons: Write-up Thread (Only PBM to be end in a defeat for the players!)
Rome Total War (RTW)
Rise of the Brutii: Write-up Thread (incomplete)
Tales of the Julii: Write-up Thread (Incomplete)
A Tale of Carthage: Write-up Thread (Incomplete)
Germania Homelands: [URL=https://forums.totalwar.org/vb/showthread.php?t=53566]Write-up Thread]
Wine and Women, A Thracian Adventure - Thrace: Write-up Thread
Chronicles of the Germanic Tribes - Germania: Write-up Thread
Horns of the Bull - Carthage: Write-up Thread (incomplete)
Heirs Of Alexander - Seleucia: Write-up Thread
The House of Julii: Write-ups Thread
Barbarian Invasion (RTW BI)
The Rise of the Alemanni: Write-up Thread
Eastern Roman Empire: Write-up Thread
Re-Unification - Western Roman Empire: Write-up Thread
Vandals: Write-up Thread
Medieval 2 Total War (M2TW)
Scotland: Write-up Thread
Armenia (Mod: Broken Crescent): Summary Thread | Write-up Thread (incomplete)
Kingdoms (M2TW Kingdoms)
New Spain: Write-up Thread
Tales of the Baltic Empires -Teutonic Order: Write-up Thread
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