The game is never innocent. N either is architecture. Their innocence is rather that of a weapon. The device is power. G ame and architecture, both retain a strict relationship with the rules (of the game, of the architecture); they are generators of the happening, of openings and uncertainties, of possible (un)expected multiplications. Architecture as a game refers to the life of a work after design and construction, to the ability to be a tool that welcomes life. I t is a way of designing open architectures which recycle the rules (and the memory) by presenting them with the apparent innocence of children’splay, poised between the rationally fragile and the relationally shy. The topic is expressed through design experimentation on architectures and infrastructures of war that constitute a complex system of visible and invisible elements, palimpsests on the move of both present traces and cancellations. The project suggests a new narration of the E astern military border through the superimposition of heterogeneous contemporary strata. The void of the urban margin constitutes the context for trying to live by playing, by recycling the in between space that counterpoints invisible military fronts and so on.