Step 0:
Hvis du har nogle save games du gerne vil gemme, så gem dem først, de burde ligge i:
...\Steam\SteamApps\common\Medieval II Total War\saves

Step 1:
Afinstaller Total War
Højreklik på spillet i Steam og klik "Afinstaller...", bagefter klik "Slet"

Hvis mappen: "...\Steam\SteamApps\common\Medieval II Total War" stadig er der, så slet den.

Step 2:
Installer Total War igennem steam.

Step 3:
Sørg for at du har alle de her filer, de ligger nok i "Overførsler" mappen:

Navn: TATW_3.0_Part1of2.exe
Størrelse: 1.59gb
Link: http://www.moddb.com/mods/third-age-total-war/downloads/third-age-total-war-30-part-1of2

Navn: TATW_3.0_Part2of2.exe
Størrelse: 1.99gb
Link: http://www.moddb.com/mods/third-age-total-war/downloads/third-age-total-war-30-part-2of2

Navn: TATW_3.2_Patch.exe
Størrelse: 217.77mb
Link: http://www.moddb.com/mods/third-age-total-war/downloads/third-age-total-war-32-patch1

Navn: Third_Age_Reforged.1.rar
Størrelse: 2.46gb
Link: http://www.moddb.com/mods/third-age-reforged/downloads/third-age-reforged-06

Navn: Third_Age_Reforged.rar
Størrelse: 146.67mb
Link: http://www.moddb.com/mods/third-age-reforged/downloads/third-age-reforged-07

Navn: Third_Age_Reforged.rar
Størrelse: 13.67mb
Link: http://www.moddb.com/mods/third-age-reforged/downloads/third-age-reforged-08

Navn: Third_Age_Reforged.rar
Størrelse: 14.29mb
Link: http://www.moddb.com/mods/third-age-reforged/downloads/third-age-reforged-085-patch

Navn: Quick_Update_performances.rar
Størrelse: 113.36kb
Link: http://www.moddb.com/mods/third-age-reforged/downloads/quick-update-performances

Step 4: Så tager vi den dér fra :)