Slovakia or Slovenia?
Bratislava (Slovakia) is on the Danube, right where Slovakia meets Austria and Hungary. Ljubljana (Slovenia) is further south-west, in the middle of Slovenia, just south of the Alps.
Budapest or Bucharest?
Budapest, the capital of Hungary, is on the Danube in the centre of Hungary. Bucharest, the capital of Romania, is much further south-east, on the Dâmbovița River in south-eastern Romania.
Rome, Vatican City or San Marino?
Vatican City is an enclave inside Rome, so those two answers are almost the same spot. San Marino is a separate small country further north, on the slopes of the Apennines about 10 km from the Adriatic coast.
Amsterdam or The Hague?
Amsterdam is the official capital of the Netherlands and the game's answer. The government sits in The Hague, on the North Sea coast to the south-west.
Bern, not Zurich
Switzerland's 'federal city' is Bern, where the government sits; Zurich is the largest city. Bern lies on the Aare river, slightly west of the centre of the country.