SecretHouses

Flag:	SecretHouses
File(s):	rules(md).ini
Values:	Comma-separated list of strings. (Limited to: Houses)
Applicable to:	TechnoTypes: AircraftTypes, BuildingTypes, InfantryTypes and VehicleTypes

Logic related to SecretHouses, as a whole or in part, is obsolete in Red Alert 2 and/or Yuri's Revenge.

Appears to have no effect in-game, although the flag is parsed and Yuri Clone does have this set as Template:TTL

It is theorised that this flag was intended to restrict access to certain units obtained via a Tech Secret Lab to specific countries, but that the idea of restricting access to such units was eventually abandoned (possibly for reasons of development time rather than gameplay).