Willem's Mansion is a location in the mod.
Willem's Mansion is the residence of Willem van Boven, a South African arms dealer. It is located along a mountain range, presumably nearby Trey Stevens' house, as he reffers the house as a "neighboring house". The living room is accessesiable in missions and can be seen through the large windows. On top of the living room, on the roof, is a patio with balcony doors that lead into his bedroom. A Stinger convertible is parked in the garage, along with a sports bike. A Schafter Sedan is always parked in the driveway.