The first of the two DLCs will be available tomorrow, the 11th, but it doesn’t expand content - in fact its three separate videos showing you were collectibles are stashed.
The videos are free whereas the actual content adding DLC will be out on the 25th at a cost of 800 MS Points. This one includes 25 self-containing missions.
Here’s the breakdown from Microsoft:
Mission Mode
What: 25 missions (basically a new campaign mode)
When: Friday, July 25
How Much: 800 MS Points
Introducing Mission Mode, a brand-new gameplay expansion for the acclaimed action game Ninja Gaiden II. In this all new game mode, challenge your skills in self-contained missions featuring trials and tribulations not found in the standard story mode. Karma Attack missions task you with obtaining the highest score, while Survival missions give you a single weapon to fight off as many enemies as possible. Take your high scores online with Xbox LIVE and compete with players around the world on the mission leaderboards!
Skull Videos
What: 30 videos that reveal the locations of hidden in-game skulls. Will split up into 3 packs and each contains 10 videos
When: Friday, July 11
How Much: Free!
Skull Video #1: Having a hard time discovering the crystal skulls located throughout Ninja Gaiden II? Use these videos to help you find the skulls, and earn Achievements in the process! This video shows the location of the first third of the skulls.
Skull Video #2 Having a hard time discovering the crystal skulls located throughout Ninja Gaiden II? Use these videos to help you find the skulls, and earn Achievements in the process! This video shows the location of the middle third of the skulls.
Skull Video #3 Having a hard time discovering the crystal skulls located throughout Ninja Gaiden II? Use these videos to help you find the skulls, and earn Achievements in the process! This video shows the location of the last third of the skulls.
I should image that you’ll need a decent short term memory for the tutorial videos, otherwise you’ll be switching in and out of the game quite a bit.
Source: Shacknews