The Silent City is a 2006 science fiction short film written and directed by Ruairí Robinson. Cillian Murphy is in it. Slice of SciFi says the film is "about three soldiers struggling for survival on a dust-laden, war-torn planet that may or may not be Earth".
Someone's bound to come along indeed.
Weird Wild Realm says, "Superbly done visual effects & well acted". Quiet Earth likes the humor and the effects. Cinema Blend calls it "highly recommended".