
Scroll down to see this list with pics. This part is just my opinion on some of the stand out games in the list. I will start off with Mega Man 1. A lot of people say that this game is really difficult, because of the lack of a password system, no E tanks, and a few bosses that are tough. Wily's first boss is considered one of the most difficult bosses to fight against, which causes many to use a cheat glitch to pass. I never found the game that difficult, and I've even completed it 3 times without losing a single life. Probably because its one of my most favorite games of all time.
Mega Man 3, one of the longest(if not the longest) games in the series, is also commonly stated to be the best of the bunch, and I agree. I've heard more people say that 2 is the best, though. I'll try not to spoil the story, but I can say that after you defeat the 8 Bosses, you have to fight 8 more stronger bosses before you move on with the rest of the game. This part alone is considered the most difficult part of the game by many. As far as difficulty goes for the whole game, it's up there, more challenging than Mega Man 1 and 2, IMO. The weapons you get aren't great as what you'd find in 2, but a few stand out in the crowd. Help items are great in this game though. The fact that very few weapons in Mega Man 3 end up being useful outside of their intended boss battle really makes this game difficult.
Mega Man 9 was said to be the most challenging game in the series, but in reality, it was because most Mega Man veterans didn't know what to expect in this game. A lot of surprises were thrown into the mix, which kept it fresh. After a few times playing the game, it gets easier, as with most Mega Man games. Most of the weapons here are extremely useful. Difficulty rating is up there with the other games, but I still think 3 tops Mega Man 9 in all ways. Mega Man 6 and 7 were a toss up for me it could of gone either way for easiest game. Mega Man 6 had Rush with pretty much limitless energy and you could avoid 90% of the platforming challenges. I think Part 6 and 7 are tied because both games are really easy.
Now here is a list from The Hardest Mega Man Game to the Easiest Mega Man Game.
















