Easter egg: On Disc 2, go to trailers, and select Theatrical Trailer #3. While the trailer is playing, input the following numbers in order (slowly): 5 6 5 3 7 (JOKER). The trailer will restart and show a modified version of the original trailer, with Joker scribbling all over it. This is a reference to the marketing campaign promoting the movie, as fans who completed the entire set of events were greeted with the third "The Dark Knight" trailer, modified by the Joker.
Easter egg: Go to the page for scenes 13-16. After you wait for a while,(Note: a lot of patience is required to find this) a 17th scene will appear. Click on it and it will take you to a page with secret military files. Unfortunately, only three of them actually work. Only time will tell how to access the other ones.
Easter egg: In the "Unrated Version", if you go to the extras menu, go all the way down to where it says "Main Menu". There will be a circle to the right of that. Push the right, but another small circle will be highlighted within the picture. It will show you what they did when they cut off the eyebrow of Jason Biggs.
Easter egg: (Blu-ray) On Disk 1, open the "Extras" submenu and highlight "BD-Live". Press the Right arrow/button and a wire-frame of Iron Man will appear below it. Press the Enter button and a brief behind-the-scene vignette between Stan Lee and Robert Downey Jr. will appear.
Easter egg: On the regular DVD (not the special 2 disc edition), go down to Special Features, press the left arrow then press the up arrow and it will highlight the B and L logo in the upper left hand corner of the screen. It will take you to "Geek-o-rama", a feature about the Pixar employees.
Easter egg: This Easter Egg is on the second page on the Extras DVD. At the bottom of the page, between the Setup and More buttons, a crown pops up. Clicking on it brings up the Easter Egg. It is called Monster Cam (it shows the scene underground in the How, when the Narnians come up and surprise the Telmarines). There is a camera put in one of the minotaur's heads.
Easter egg: On the "Bonus Disk", press the down button and a "Code Of The Fraternity" menu option will appear. Press the Select/Enter button and enter the code "01010111" (binary code for "W") to watch a behind-the-scene video.
Easter egg: On the standard DVD edition, go to Bonus Features. Press the right-hand button on your remote control and two footprints will appear in the bottom-right hand side of the screen. Select this, then a Bonus Feature about Adam Sevani's kiss will play.
Easter egg: On the Main Menu, you can find a sequence of the crew (not including any of the original actors) performing "We Rock". Place your arrow on Play, then go up, and you will see the guitar string tuner on the CAMP ROCK logo slightly highlight.
Easter egg: In the "Unrated" version go to Bonus Features. Scroll down to Bloopers and push the right button. You will see two hands light up. That will take you to a short called "Wainy Days".