Hippo Shell

If you look closely at a shotgun round in Halo you might see a little picture around it. This is simply a picture of a hippo. It is on every shell and can be seen with a sniper rifle after a shell is on the ground, or it can be seen when paused on single player while reloading.

Tank Numbers

Have you ever ridden on the Scorpion (Tank) and wondered what all of those Numbers meant? No theyre not numbers picked out of nowhere, they were actually put in there by one of HALOs Art Director: Marcus Lehto.

The numbers 030569 represent his birthday, March 5^th, 1969

What the hell is on your boot?

If you look closely at the Master Chiefs right foot, when hes walking/running, you can see the initials MRL. These initials stand for Halos Art Director (and the man behind MCs skin) Marcus R. Lehto. To view this egg, you can see it by zooming in on a players foot in Multiplayer with the Pistol or the Sniper Rifle.

Hello Whats your name again?

This egg is pretty funny and very obvious once you have found it. If you look closely at Cpt. Jacob Keyes shirt, there is an area on his left part of his chest (when looking your right) you will see a big circular patch right beside his name: KEYES. Right above that there is some text that is difficult to make out, but it says, Hello, my name. You can view this Egg, when you first meet Keyes on the bridge of the POA. You can also see it quite easily on the level: Truth and Reconciliation; right after you free Keyes from his holding cell, you can use your Snipers Scope to zoom in on that area.

Billboard

On the level there is a billboard/bulletin board, with posters and advertisements on it. Here is what the say.

Hrm What does that really say?

 To see this egg, go to the Multiplayer main menu. Go down to EDIT GAMETYPES and you will see a picture with little arrows coming out all over him with text. Although this is very hard to read, there are people who have been able to make out what it actually says.