Merry Christmas

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Across
  1. 3. Second best selling PC game
  2. 4. Sn on the periodic table
  3. 5. Disease Edward Jenner developed a vaccine against in the 1790s
  4. 7. Name given to the centre of a hurricane
  5. 8. July's Birthstone
Down
  1. 1. Civilization conquered by Cortes
  2. 2. Superhero played by Ryan Reynolds
  3. 3. Illegal liquor known as 'white lightning'
  4. 6. Major city in Belgium