Carnival is a map made up of an abandoned, dilapidated amusement park. It is located most likely in Brazil, considering that the factions are TF-141 and Militia, as well as the fact that the surrounding mountainous landscape is similar to the terrain of Rundown. However, the highway running alongside the map seems to be the same one as featured in parts of the campaign.
The map is made up of sections that all are connected, usually by several routes. The most important and well known being the Funhaus, the "World of Tomorrow" - a space-theme area, the medieval castle, a roller coaster and an area with many food vendors along with a carousel.
as the castle provides great fortification and it gives the player a height advantage to any intruders that may come through. The isolated parts of the map (roller coasters) are great places to flank the enemy as it allows for a stealthy infiltration without much trouble. Submachine Guns and shotguns are the best weapons to use on this map, due to the amount of Close Quarters Combat. Snipers should only be used if they are Quick Scoping or sniping in the rocket or castle (with claymores).
If the player had a squad they could easily take control over the Funhaus and camp there. Have one player watch the upstairs room and watch the roller coaster area, one sit behind the Call of Duty 4 arcade game and watch the back first floor entrance, have one watch the clown head entrance. finally have one person watch the side windows on the first floor. If the player has any extra players, have one patrol the Funhaus and one watch the rocket ship area from the second story window.