Fics like Phineas's Game

You don't have to know Ender's Game to understand this. Think of it as a hard sci-fi AU (that I can't believe I'm writing). In order to prepare for the Third Invasion, the brightest young minds of Earth are taken to the orbiting Battle School to learn strategy, leadership, and zero-g combat. From the beginning, Major Monogram and the other teachers pay special attention to Phineas Flynn and his friends. He may be the key to saving humanity, if they can just shake his damnable respect for all life. This is harder than they could have imagined. The adults say that war is a game. They're lying to you. (Meanwhile, Heinz Doofenshmirtz tries to take over the world via blogosphere. This goes as well as expected.)

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  1. The Transmigratinator by Boomchick (人渣反派自救系统 - 墨香铜臭 | The Scum Villain's Self-Saving System - Mòxiāng Tóngxiù, Phineas and Ferb)
  2. Early Days by LoonyLoomy (Phineas and Ferb)
  3. Mistakes and Worry by Fangirlwriting (Phineas and Ferb)
  4. Give Me Something To Cry About by IronicAppreciation (Phineas and Ferb)
  5. The New Gig by Kereea (Phineas and Ferb)
  6. How Does It Happen? by agoldengalaxy (Milo Murphy's Law, Phineas and Ferb)
  7. well, i wanna go back (but i'm halfway to the place where we will meet) by flibbertygigget (Phineas and Ferb)
  8. Quiet Revelations by ShadowoftheLamp (Phineas and Ferb)
  9. Indulgence by WinryWeiss (Phineas and Ferb)
  10. Be Right There by orphan_account (Phineas and Ferb)
  11. Sci Meets Sci by detectivejigsaw (Gravity Falls, Phineas and Ferb)
  12. It's Not the Fall by GrayceAdamsArchive (Phineas and Ferb)
  13. Myriads of Shards of the Connexions between Us by WinryWeiss (Phineas and Ferb)
  14. If You'll Still Have Me by kittyhazelnut (Phineas and Ferb)
  15. (Almond) Brittle Memories by Lex%20Lucero (Phineas and Ferb)
  16. Waterlogged by TolkienScholar23 (Phineas and Ferb)
  17. Mystery Business by Cobalt_Nights (Phineas and Ferb)
  18. Time Out by radondoran (Phineas and Ferb)
  19. The Discovery of the Platypus in His Natural Habitat by radondoran (Phineas and Ferb)
  20. Towards the Sun by Word_Addict (Phineas and Ferb, Gravity Falls)