Fallout 3

I just completed it and i'm annoyed because i didn't know it was just going to end and not let me carry on doing other quests. I was trying to collect all the bobble heads and do quests and get to higher levels. Am i missing something and it is actually possible to carry on?

Edit: Just found out the DLC will allow you to carry on but it isn't coming to PS3 so i won't be able to get the trophies i missed without starting a new game which i can't be bothered to do.

I saved right before I went into the purizer

I'll probably start again. I wasn't in the mood before but now I am.

Sucks about the DLC aswell though. I heard it's where you get to join the Brotherhood.