Damp Dungeon is the nineteenth level in Donkey Kong Country Returns and Donkey Kong Country Returns 3D, and the fourth level in the Ruins world. To access the level, the Kongs are required to have a Map Key from Cranky Kong's Shop.
As the level's name suggests, Damp Dungeon takes place in a dark dungeon full of water. Since neither Donkey or Diddy Kong can swim, they must use platforms on moving various water mills to transverse large gaps, with not every mill functioning the same; some mills do not orbit 360 degrees, while others may be missing platforms or have enemies on them. Many fragile stone platforms are throughout, and they collapse if the Kongs stand on them for too long. Climbing Grass appears on the ceiling in some parts of the level, allowing the Kongs to climb over water and spikes.
In the Time Attack mode of the game, a time of 0:56:00 is needed to get a gold medal, a time of 1:30:00 for silver, and a time of 1:51:00 for bronze.
The level begins in a small jungle area leading into a dark dungeon area. The first thing the Kongs come up to in here is an urn with a collectible in it, followed by a single Rawk. A turning wheel is after this, supporting four platforms. One of its platforms have a Banana Coin on them, while the others have one banana each. Another wheel is farther ahead, which is much larger than the previous. It can be reached by using a platform between the two wheels, which has a DK Barrel on it. A Snaggles jumps out of the water here, and a Tiki Bomber attacks from the center platform on the second wheel. After another Snaggles near this wheel is an area of solid ground, where some Rawks can be found. Some grassy turf is located on the ceiling just after the second Rawk to help the Kongs cross some water. Three small, crumbling platforms are under this ceiling with collectibles on them; the middle platform holds the letter K. However, the platforms fall as soon as they are stood on, so the Kongs must be careful.
Two solid, stone platforms rise above the water after the end of the turf, so the primates can continue to travel above the water and get to a turning wheel. A Stilts is just before this wheel, and a Tiki Bomber is on the platform in the center of it. The wheel supports four platforms, each with a certain collectible on it. A set of two platforms are near this wheel. One platform is placed below the other, which is supported by a large structure in the background. The platform on the bottom of the area has a urn on it, which reveals an item when broken open, and the platform above it has a Screaming Pillar behind it. A small wheel is farther ahead, and it can only be reached by jumping from the higher platform of the previous area. This wheel has collectibles on the two boards that it is holding for the Kongs to grab. The letter O is also in the center of it. Another platform is just ahead of this wheel with a heart on it. A Screaming Pillar is also behind the item.
There is another wheel right after this area, and under it is a solid area of stone that is placed above the water. A barrel and a dandelion are on it. The wheel, which moves faster than the previous wheels, has two bananas on each of the platforms it supports. Farther ahead, there is a stone pathway leading over the water. This area is infested with Rawks and has several platforms that cannot hold the Kongs very long before falling. Fortunately, many Banana Coins are above these foes and the Tutorial Pig is at the end of the area at the checkpoint. Farther ahead, the Kongs can find a Stilts at the end of a stone pathway, as well as a DK Barrel on a small platform just before it. Near the enemy is a Barrel Cannon. Below this object is a small platform with a windmill next to it that Donkey or Diddy can blow on to reveal a hidden platform in the background. The Barrel Cannon can shoot the heroes into the background, where there are many platforms that fall when stood on. Bananas are between each of the platforms, which help the Kongs reach an area with some Rawks and an urn, as well as a small platform with a barrel on it.
Another wheel is just ahead, and some Snaggles just out of the water below it. This wheel, along with the two wheels after it, have three platforms on one side of them and do not move in a full circle. Instead, they move back and forth, swinging the Kongs above the water. Each platform on the three wheels has a collectible on it, and a Banana Coin is also in the center of the first two wheels. The third wheel has a Tiki Bomber on the platform in the center of it, and many Snaggles also jump out from the water under it. A pathway of bananas and the letter K leads the heroes to a Barrel Cannon at the end of the area. This cannon shoots them to the foreground, where dandelions grow at the edge of the stone pathway. The pathway leads to some spikes, which can safely be crossed if the Kongs use the grassy turf on the ceiling. A Stilts walk through the spikes, so they must also watch out for this foe. Two large, solid platforms are after this area. The first platform holds an urn with an item in it, while the second has two Rawks and a dandelion on it. One last wheel is just ahead. It supports two platforms with collectibles on them and helps the Kongs reach the Slot Machine Barrel floating in the air above the water. A Mega Snaggles guards the barrel, but if the heroes avoid it and hit the object, the level is completed.
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