Proto Man ($2): Proto Man can charge his shots, block shots with his shield, and slide. Sounds good, right? Well, maybe. There's a lot more to him than that. For instance, he can't visit the store and he takes double damage. Before spending the points on him, you should definitely consider his pros and cons, because for some gamers, the weaknesses may outweigh the strengths. For the sake of keeping this brief, here's a list of details about Proto Man I wrote for The Tanooki when he was released a few weeks ago.
Endless Attack Mode ($3): In Endless Attack Mode, you basically play until you die. To keep things interesting, the stage you play is brand new and randomized. That means you won't be playing in any of the stages you've already played in the main mode, and every time you play it's a different experience. This mode is definitely worth the money.
Special Stage ($1): The Special Stage is a new level for Time Attack mode, complete with a new boss. The stage is pretty challenging, and it reuses some of the bosses from the main game. It's about as tough as one of the Dr. Wily stages. The new boss is nice, but he's not particularly tough if you know your weapons and figure out his pattern. Still, the level itself is great and it's a steal at one dollar.
Hero Mode ($1): Hero Mode is a new difficulty setting, harder than the standard mode. The difficulty increase comes from new enemy placement and obstacles. This mode is a bit disappointing. If you've finished Mega Man 9 and are looking for more of a challenge, this may not be enough. I still managed to breeze through the Robot Masters stages. Of course, that's not to say it's not challenging. Mega Man 9 is pretty tough on its own, and Hero mode is even tougher. (I "breezed" through it because I've been playing the game since it was released and I had a pretty good idea of what to do.) It's just not much tougher than the standard mode. I guess that's why there's:
Super Hero Mode ($1): Argh. Alright, this isn't really fun any more. See, the challenge of Mega Man 9 is the fun kind of challenge, because as difficult as it is, it's never cheap. Well, Super Hero Mode is cheap. For example, there's one part in Galaxy Man's stage that WILL kill you if you're not insanely lucky or psychic. Right before the boss door there's an enemy that will grab you (because you won't know he's there). Your choices then are to either sit there and let him do his thing, ending up smashed against a wall of spikes, or jump over the wall of spikes and land in a pit. That's it. Those are your options. Death or death. Things like that will likely annoy a whole lot of people, but if you don't mind the frustration (and if you're a fan of Mega Man, you're probably ok with frustration), it might be worth a look. It's too bad there's no middle ground between Hero and Superhero modes, though.
Well, that about covers it. There doesn't seem to be any more DLC planned. All together, the game and DLC costs $18. I bought it all, so you don't have to!