Mega Man X5 Improvement Project Addendum, developed by acediez based on DarkSamus993's improvement project, aims to add new features to the original Mega Man X5 game, such as removing Alia's mandatory hints, both X and Zero benefit from the same bonuses, guaranteed Enigma/Shuttle launch, and many more, leading to a fast and more enjoyable experience of the original game.

M3 clears all stages using Zero in just 40 minutes, which is around 3 minutes faster compared to the original all stages run. Please read author's comments for more information about the project and this run.