Puzzle Give Away!!!

So this is my first puzzle so I'm hoping most of you know how this works. The Cases are http://www.steamgifts.com/giveaway/XXXxX and big X's can be numbers. As always is 5 letters and here are the 5 clues they will start out easy, I think, and get harder (Not really because I'm bad at this). Also READ EVERY CLUE CAREFULLY IN ONE OF THE CLUES ONE WORD MAKES ALL THE DIFFERENCE:

1) In what game can you test your skill on the Fields of Justice? (First Character)

2) "For the good of all of us. Except the ones who are dead." (The last letter in the last name of the PERSON who is responsible for this line)

3) http://images.triplem.com.au/2009/03/18/149786/rock-star-o-face-13-600x400.jpg (Ran out of ideas so this one is easy)

4) Insane Clown Posse (Google them if you have no idea) has difficulty understanding how basic things function, it's quite sad. [(First letter of the object)(on an unrelated note some studies have shown that this object can cause cancer if it is highly powered and you are exposed to it for a long time)]

5) I'm the tough guy in the field of chemistry and physics. I'm Stronger than my cousins, Alpha and Beta. I'm even more powerful than what Röntgen observed and, move so fast you couldn't even see me coming if you tried. I'm like Danny Phantom because I can walk through walls (More like shoot through walls), Disappear (wait, you already can't see me) and fly (pretty freaking fast). I actually might be responsible for giving Danny Phantom these powers now that I think about it. (Oh yea and P.S. I'm lazy and don't write shit out and close enough is good enough for me aka, my keyboard isn't greek)

LAST MINUTE HINT for QUESTION 5: GOOGLE IMAGES WILL HELP!

I know some of them are easy and others hard (or just all easy I don't really know) but I don't know how to gauge it well so if no one gets it I'll fix it up a bit or give more clues.

Edit: people are getting it so its all good. Also when you finish this puzzle at the end I'm going to put up another give away that will be open for a while and will be better so enter that one too.

NOTICE: IT CLOSES AT 10 So HURRY UP however, if you make it, I am posting another puzzle give away tomorrow and everyone who makes this puzzle will get an extra clue so keep trying!

Here are the Answers:
1) League Of Legends
2) Jonathan Coulton or Ellen McLain
3) We all got that the same way
4) Magnets http://knowyourmeme.com/memes/fcking-magnets-how-do-they-work
5) The Greek letter for gamma looks enough like Y ("close enough is good enough") and as I said I don't have a Greek keyboard =) Also I never mentioned that it was the first letter so G wouldn't necessarily be the answer! I know 5 was very tricky and that's where most people went wrong but I realized it and tried to hint to the fact it isn't G for gamma. So sorry about that next one will be less weird thought patterns and more logic!

CLOSED But I'm making a new one tomorrow (I think don't hold me to it, if it isn't tomorrow it will be this weekend) I think that will be easier with less creative thinking clues! Also Gradz to epsilonm for winning!

<white> hi </white>