Fallout 3, the hit role-playing action game from Bethesda Softworks, refuses to fade away. Not that we want it to. After all, the 2008 game scored an average of 93/100 on Metracritic, and keeps us coming back for more with decent downloadable content that adds new areas, missions and items to the game.

The first download, Operation Anchorage, felt somewhat divorced from the rest of the game, as a stand-alone run-and-gun campaign, while more satisfying The Pitt played like a traditional Fallout quest, but was still set in a different map (a slave camp in the ruins of Pittsburgh).

The third download pack, called Broken Steel, will arrive on May 5, 2009 for 800 points on Xbox 360 and PC. If you're thinking of dropping some Microsoft Points for it, here's what you need to know.

1. If you didn't like how Fallout ended, you can keep on going.

One of the biggest complaints about Fallout? Finish the main quest and the game comes to a screeching halt. If you haven't played through all of the side quests before that point, you are forced to load an older saved game and continue from there. Broken Steel removes the finality of the original ending and allows you to keep exploring.

2. Level cap raises from 20 to 30

In the regular game, characters can build skills and add perks, special permanent stat boosts, until they reach level 20. Now the level cap has been moved to 30. Pete Hines, VP of Public Relations for Bethesda, says it will be progressively more difficult to jump from level to level; to keep people more engaged in the experience. As you reach new levels, you will be allowed to select new Perks for your characters, including a new one called "Puppies!" which will let you get a new dog in case your canine companion Dogmeat gets killed during battle. Other new perks will unlock as you reach new levels, but the number or names of them have not been announced yet.

3. Ghouls aren't just low-level cannon fodder anymore

Broken Steel also brings more mutation madness with more challenging enemies like the Feral Ghoul Reaver -- a feral ghoul with armor and a tendency to toss grenades. Players will also run across Super Mutant Overlords, new Super Mutants with bigger guns and a bigger challenge to kill.

New, more powerful weapons, like a Tesla cannon that shoots a powerful laser, and armor will be available to combat these new, more powerful enemies.

4. Welcome to Adams Air Force Base

Broken Steel will unlock a new area called Adams Air Force base, where you start with a crate of supplies and your orders. The specific tasks weren't identified during the demo, but it will involve avoiding heavy incoming fire while strategically taking out soldiers, turrets and enemy helicopters. In another part of the expansion, players will also be able to check out the Presidential Metro Tunnel that runs underneath the White House.

5. There will be no more official Fallout endings.

This Xbox 360 and PC add-on promises to be a little longer than the previous two downloadable packs -- The Pitt and Operation Anchorage -- and, no, it will not add a new ending to the original story. Bethesda apparently plans to keep the doors wide open for many more add-on packs. Unless you own Fallout for PlayStation 3, that is. There is still no word whether Broken Steel or any other other additional content will come to Sony's gaming system anytime soon.