If you loved I Am a Hero, try Kingdom III: The Flame of Destiny
A bridge between a film you've already seen and one most people haven't. Kingdom III: The Flame of Destiny has roughly 3.7× fewer votes than I Am a Hero — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Shinsuke Sato, and they both carry the foreign gem, unhinged mood tags, and they sit in Action territory. If that's the register that drew you to I Am a Hero, the second film will land in a comparable space — through a different lens.
What Kingdom III: The Flame of Destiny is
You command troops against an invading army. Your goal: protect the kingdom. But a former orphan rises through the ranks, seeking battlefield renown. Director Shinsuke Sato elevates manga adaptations; this one burns brightest in chaotic battle scenes.

