8-bit music...
	Boy and His Blob characters...
	Concept art...
	Various Achievements...

Hold LB + RB + LT + RT + click Left Analog-stick + click Right Analog-stick + Back and press Start at the "Level Select" menu.

If you go to the last level "escape" just after you cross both lava pits if you high jump up the left wall you can climb it. Continue climbing (watch for bullets shooting you) and dash right when you make it to the top. You can't turn into the raven due to the machines so dash right as much as you can until you find the red skull. At the final wall, wall bounce over it and you will find the two cute characters behind bars.

Successfully complete the game to unlock the "Concept Artwork" option at the main menu.

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
8 Fingers, 8 Bits (5 points)	Activate BloodRayne: Betrayal's alternate soundtrack.
A Foot Face? (5 points)	Find the hidden idol.
Chainsplosion! (5 points)	Chain explode 5 enemies.
Coffin Kicker (10 points)	Kick open the Coffin Rocket 20 times.
Collateral (15 points)	Kill 250 enemies with environmental hazards.
Ms. Perfect (25 points)	Complete any level while taking no damage.
Pro Vamp (50 points)	Finish every level with the ranking "Dhampir".
Skulltastic (30 points)	Collect all the Ancient Vampire Skulls.
Survived to Sunrise (25 points)	Complete the game.
That Funky Puncher (15 points)	Defeat Crab Puncher without getting hit.
The Last Bullet (5 points)	Kill 5 enemies with a single gunshot.
Walking on Air (10 points)	Hop on 50 heads in a row without touching the ground.