Battle Royale
Why it's similar
Battle Royale came out in Japan in 1999, a full nine years before The Hunger Games hit shelves. Koushun Takami takes a class of ninth graders, dumps them on an island with random weapons, and forces them to kill each other until one survives. The premise is so close to Collins's arena that readers have argued about the connection for years. But Takami's approach is different in tone. He cycles through dozens of students, giving you just enough backstory on each one to make every death hurt.
The violence is blunter, the government's cruelty more casual, and the pacing is relentless. Where Collins filters everything through Katniss's first-person survival instinct, Takami pulls the camera wide and lets you see the full horror of the system. The book reads like a thriller that never takes its foot off the gas. It is gorier and more explicit than The Hunger Games, so readers who want a PG-13 experience should know what they are signing up for. But if the arena concept is what hooked you about Collins's book, Battle Royale is the original blueprint and still one of the most intense reading experiences in the genre.