The Retrofit Mod requires M2TW: Kingdoms. Installer: The mod is packaged with an easy to use installer for computers with a valid installation of M2TW: Kingdoms. Miscellaneous bug fixes and improvements. 4 Additional custom battle maps (Backwoods, Borderlands, Forts, Trenches). The major features of the Retrofit Mod are: This mod can be used as it is, or as a base to create additional M2TW: Kingdoms mods (see section 5.0). The Retrofit Mod retrofits various Medieval II Total War (M2TW): Kingdoms features, improvements and bug fixes to vanilla M2TW. Retrofits various Medieval II Total War (M2TW): Kingdoms features, improvements and bug fixes to vanilla M2TW.