Here are some recommended series of game novels that focus on the development of antagonists:
1. "大反派的養(yǎng)成游戲" by 杜三溪: This novel tells the story of a young man named 楚無天 who seeks revenge for his father but fails. When he wakes up, he is transported back to his childhood and decides to reclaim everything he lost. He trains a twin assassin and teaches a female swordsman. (Document [1])
2. "反派帝王養(yǎng)成計(jì)劃" by 長風(fēng)谷: The protagonist, 夏霜寒, finds herself in a novel and gains an emperor development system. She must make the chosen person become the emperor to gain her freedom. The person she chooses happens to be an antagonist. (Document [2])
3. "反派養(yǎng)成系統(tǒng)" by 嘎叭: This novel revolves around the main character 沈蓁蓁 and her love for a person she should hate. (Document [4])
4. "反派Boss養(yǎng)成攻略" by 白棣: The story follows 洛玉 and her journey through time and space. She encounters various characters, including the antagonist, and develops a special bond with them. (Document [7])
Please note that these recommendations are based on the provided search results and may not include all available novels in the genre.