Original X Collection as well as XLC allowed. Timing begins when selecting either Zero or X on X4 and ends on the final hit on Hell Sigma on X6. Games must be beaten in order. No FDS allowed.
Multigame run rules: https://megamanleaderboards.net/index.php?page=multigame
Any% rules: Beat MMX4, MMX5 and MMX6 on Normal difficulty.