GasHero Xmas Puzzle

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Across
  1. 3. we protect the AI factory
  2. 6. i boost attack and speed
  3. 7. I'll tell you when its over
  4. 8. Hero is useless on the battlefield without it
  5. 10. Turtle mode
  6. 11. To infinity and beyond
Down
  1. 1. it's more fun with friends
  2. 2. 100 is enough
  3. 4. burn 1200 energy as a clan to get one
  4. 5. number of levels to pass the underground
  5. 9. strongest city during the community test
  6. 10. you can randomly get one after winning a personal adventure