ODST is epic. Like Darkish said, it's a must-buy for anybody who likes First Person Shooters.
Can you get it for PC?
No Thrawn, there are alternatives to PC FPS's. It's called the "console".
*pats head consolingly*
*hits with frying pan*
You cannot properly FPS on a console. End of story.
It was hard. Don't expect to beat it your first time unless you get lucky.
Have you played Halo or Gears of War on a console yet, heretic?