Blowin' the Dam is the 22nd chapter of Duke Nukem Forever.
Blowin' the Dam is an underwater level. While underwater, the player must continually seek oxygen bubbles in order to survive. Catfish can be found on this level, though they never attack the player.
Near the end of the level, there is a boss battle with the Energy Leech.
There is one new ego boost on this level that cannot be found on any previous level:
- Energy Leech: Defeat the Energy Leech. (+1 Ego)
There is one helmet on this level. It cannot be worn, but it is one of three helmets that must be found throughout the game in order to unlock the "Bucket Head" achievement:
- Psycho: Where Duke plants the first explosive on this level, turn left. Swim through the first overpass. Instead of swimming straight ahead, turn left again. There is a floating corpse with a spotlight shining on it. Swim into the debris to the left of the corpse. Swim to the top of the debris. Inside the debris, emerge from the water to find Psycho's helmet from Borderlands.
- On Blowin' the Dam: Part 2, there is a reference to Donkey Kong and Mario where barrels are bouncing down a staircase. Duke says, "Damn I wish I had a hammer right about now", and when he gets to the top of the staircase, he says, "Oh, I was expecting a monkey."