Another little tyke in which will involve another easter egg,after the appearance of the Emerald teddy bear - but this bear will appear after 2 rounds after the emerald bear ; The Topaz Teddy Bear!
This little guy is mysterious-yet-harmless,why? Once he spawns and walks around some areas of the map in "Left 4 Dead",and you follow him,he will be pointing at a portrait of the Mona Lisa,and you shot the portrait and behind it,a large crack on the wall : once you shoot or knife the wall,a portal door will appear and temporarily transport you to a space shuttle in space,only it is not the same as the Emerald teddy bear....this shuttle will belong to Eggman!

Once you arrive at the station,the easter egg will commence with the player activating a button on the computer screen and a video feed of Robotnik's scientists testing the Mobian subjects into Robotization!

After the easter egg round,the little guy will disappear and will reward you the Double Max Ammo - boosting your original max ammo twice as much as you may carry

Enjoy :D