Off the device!

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Across
  1. 4. period of time
  2. 5. mythical animal originating in America
  3. 7. telephone company
  4. 8. Catchphrase of gaming's Italian plumber
  5. 12. Jens of gaming
  6. 13. Head of the egyptian god Thoth
  7. 15. fish commonly caught in fjords
  8. 16. Chowdhury STEM competition submission by Ethan
  9. 18. the belief that nothing matters
Down
  1. 1. deli meat
  2. 2. The first pokemon game to be sold in both America and Japan
  3. 3. the science of preservation via freezing
  4. 6. newest mars rover, to be launched tomorrow
  5. 9. Oldest still-practiced language, hailing from India
  6. 10. slightly larger than a megabyte
  7. 11. epic by homer
  8. 14. scratch developer
  9. 17. math game enemy