acceptance action adolescence advanced-technology adventure ai ai-(artificial-intelligence) alien-communication alien-invasion alien-species alien-technology aliens artificial-intelligence assimilation battle battle-school battle-tactics battling betrayal brotherhood bullying character-development child-prodigy child-soldiers children children-in-war chosen-one colonization coming-of-age command communication compassion competition complex-characters computer-games courage cybernetics deception destiny dystopia dystopian dystopian-future dystopian-society education empathy end-of-the-world ender ender-wiggin enders-game enders-siblings epic-battles espionage ethical-dilemmas ethics exploration extermination extraterrestrial-intelligence extraterrestrial-life family family-dynamics fantasy fear friendship future future-society futuristic futuristic-setting futuristic-society futuristic-technology game game-theory games gaming genetic-engineering genetic-manipulation genius genius-protagonist geniuses genocide gifted-children government government-conspiracy government-control government-manipulation heroism hidden-agendas hive-mind human-extinction humanity identity independence intelligence intense intergalactic-war interstellar-politics interstellar-travel interstellar-war isolation leadership loneliness loyalty manipulation military military-academy military-fiction military-school military-science-fiction military-strategy military-tactics military-training mind-control mind-game mind-games mind-manipulation moral-ambiguity moral-dilemma moral-dilemmas morality orson-scott-card outcast outer-space peer-pressure philosophical political-intrigue politics power-dynamics power-struggle protagonist psychological psychological-manipulation psychological-warfare psychology redemption revenge sacrifice school school-life sci-fi science-fiction secrets self-discovery sibling-dynamics sibling-relationship sibling-relationships sibling-relationships. sibling-rivalry siblings simulation-games soldier space space-academy space-battle space-battles space-colonization space-exploration space-opera space-travel space-war space-warfare strategic strategic-genius strategic-thinking strategy surveillance survival survival-skills suspense tactical tactical-genius talented-children team-building teamwork technology telepathy the-future thrill training trauma trust ultimate-game unconventional underdog video-game video-games video-gaming videogames violence virtual-reality virtual-reality-games war war-games war-strategy war-tactics warfare world-building xenocide xenophobia young-adult youth