Play Rockman Zero 4 Online

Rockman Zero 4 came out on the Game Boy Advance in 2005, developed by Inti Creates. It was the last main entry in the Zero series on that handheld, arriving late in the GBA's life when players expected tight, polished action games. The hardware was well understood by then, and this game pushed the system's capabilities without overreaching.

You control Zero, a Reploid with a sword and buster, fighting through side scrolling stages against mechanized enemies and large bosses. Your main goal is to stop Dr. Weil and his army from crashing a massive space colony into Earth. The game introduces weather conditions that change how you approach combat; sandstorms reduce visibility, while extreme heat drains your health. You also collect Cyber Elves to gain permanent upgrades, and the level design encourages careful exploration for hidden items. The pacing is fast, and the difficulty remains high, demanding precise jumps and quick reflexes. It feels responsive and challenging, with every mistake costing you dearly.