Mega Man game difficulty ranking

>S tier
Mega Man
MM9
MM10 (hard mode)
MM11 (gearless)

>A tier
MM2 (Japanese)
MM3
MM4
MM10 (normal mode)

>B tier
MM5
MM6
MM&B
MM11 (with gears)

>C tier
MM7
MM8

>D tier
MM2 (American)
MM10 (easy mode)