Additional city tile released as a promo in CZ, EN, DE, FR, ES, PL. Prague (B/A) Blue side (research 3) "Once per round, when you would shoot down a ship, you can instead shoot down a different ship that is higher in the sky. It doesn't need to be on an explosion space." Red side (research 2) "Whenever you would shoot down a ship, you can instead shoot down a different ship on the same sky tile or higher. It doesn't need to be on an explosion space."