Halo 3: ODST Easter Eggs

during the last cutscene of coastal highway
(not the legendary ending)i wont give away any spoilers but keep pressing left on the right stick and it should turn the view about halfway through the clip and you should see the monkey man from the halo... more

Just play through Oni Alpha Site as you normally would, when you get to the part where you defend the inside of the building you will see a pile of sandbags (not by the machinegun turret). Go past the sand bags you will see a whole bunch of pillars, you... more

In the level Uplift Reserve, there is a warthog with a medic healing a marine that's going crazy. This crazy marine is none other then the suicidal marine from the Halo 3 level Floodgate.