Just a random question.
Mine would be for a platformer, so:

Description: You walk through the loving game. Yeah, you don't get damaged either. Why? There's zero enemies. There's no obstacles either. It's a literal walkthrough. Boring, right?

Description: Way less enemies and 5 hits = 1 hit point. This is for people looking to TAS or just babbys. Hence the difficulty title.

Description: A few less enemies than there were before, and obstacles are less common. Help is around to get across hard parts. Powerups are common (life, other things). Made for platforming newbies or terribads.

Description: The standard game. Same amount of enemies and obstacles, the original thing. 5 continues. Are you ready to save the princess? Oh wait, what are we doing, again? I dunno. I'd have to reread the story.

Description: A few more enemies than there were before. Health limited to around 3 hitpoints. Same amount of continues as Standard mode. Not for the average gamer.

Description: Hey, woah, woah, you wanna try THIS? Well, okay. A lot more enemies, with more obstacles and stuff to forget you over. Made for extreme hardcore MLG players.

Description: Too much stuff. WAY too much stuff. You got 0 hit points. You get hit once, you're dead. No continues, either. Do you have what it takes to become the Demigod of /r/gaming? Or /v/? Or whatever other online community you're loving on?
Ignore the faces I put from my char. I just put them there because they're the only thing I had. Get over that this character is being used, it's not that bad.
Anyways, post your diffs, you don't require images.