Hippo in Halo

Some serious hunting went into figuring out where a hippo might be hidden in Halo after, on December 6, 2001, "Matt" wrote a long treatise on hippos, and why they should have been in Halo 1 (and why they, for the most part, aren't) - but he finished with this teaser:


 * "...they may not hug walls anymore, but they're still in the game (thanks again to Robt.), and they're still extremely lethal. But you'll need excellent vision and a really nice TV to spot them."

Everything from the bottom of Warthogs to Sniper Rifles were postulated, but they were finally spotted on the spent shells of the Shotgun that fall to the ground after the player has fired a blast. When the shell is on the ground, you can see easily with the Sniper Rifle's zoom. You can also see them while reloading the shotgun. The same hippo is also on the multiplayer level Headlong in the tower on the wall.