Could you explain them in a simple way?

[RedKit]

I need someone to help me understand these statements which are from a game named Max Payne 3. I'm trying to translate them into my native language, so people in my country can play it.
"The force fenced in the felonious friends for a foul feeding frenzy." (don't understand that at all)
"There are updates going live with a CS hashtag, calling for an attack."(what is the exact meaning of hashtag?)
and some phrases like "get coal" and " have one's nest egg".
I know it is kinda hard to explain all of them, esp in different words, but i will be grateful if you at least make them easy to understand for me. Thanks in advance.

[Zé Ramalho]

I will restate it in a simple way...

"The force fenced in the felonious friends for a foul feeding frenzy."
-The enemies have been rounded up for destruction.

"What is a hashtag?"
# <---- That is a hashtag. People put it on social networking sites. (Ex. #YOLO; #SWAG; etc.) Annoying, I know....

Coal is used to fuel fire and create electricity. At extreme temperatures, coal can also be turned into diamond.