What Could This Be????

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Across
  1. 2. What did we begin with?
  2. 5. Protag of famous boxing anime series
  3. 6. How many balls does Josuke from Part 8 have?
  4. 7. FNAF VR Game ____ Wanted
  5. 11. Sega's famous arcade game called Crazy ____
  6. 12. a crystalline compound found in blood and urine which is an intermediate in the metabolic breakdown of nucleic acids to uric acid.
  7. 13. Highly addictive substance
  8. 15. Ring The Video Game
Down
  1. 1. Billy's Favorite Card Game
  2. 3. Half Fire, Half Ice, What's My ____
  3. 4. Prop Hunt
  4. 8. He wants the formula
  5. 9. How many chaos emeralds are there?
  6. 10. How many hours do you have in SF6 (integer)
  7. 14. Only for Genius? -1_ (Wrong Answer)