BF recreated his house and the square in front of it in hl2. He added secret room to his house. We only ever played it 1vs1 but it's one of my top 5 FPS memories ! The fun came from walking in a setting I knew and recognizing it as "our" immediate surroundings. It was not about killing each other, though blowing up part of the furniture in the house was fun.

I didn't like playing with people who were too much focused on killing+owning/taunting other players though, it was (and still is) my limit.