Mega Man Zero 3 is the third game in the Mega Man Zero series. It features mostly the same gameplay as before, but with a different Cyber Elf system, customizable armor, and new Secret Disks, which can be analyzed for information about the series, enemies, items, and the characters. The story takes place two months after Mega Man Zero 2 when a resurrected Copy-X suddenly appears from space and takes over Neo-Arcadia once again with his reviver Dr. Weil at his side. It is up to Zero, Ciel, and friends to get to the ever-dangerous Dark Elf before Dr. Weil and the mysterious Omega does.

For this run, Darkman425 opts to use only the Z-Buster, using the Z-Saber in certain levels when the game forces him to. He also aims for a maximum mission score for every mission in the game, which requires completing every objective and meeting all the kill quotas, all while not taking any damage. He does this as fast as possible with lots of RNG manipulation involved. For more details on how this run was done and the mechanics involved, you can read the author's notes.