A NEW monster. The cobra is a wily snake that will hunt and spit venom until you or he is dead! Watch out, don't use your knee (or knife), you may be bitten. - Duke Xtreme description
It's basically a large red and yellow cobra with a white head. It has four radiation symbols; the front and back of it have two each.
Like all the optional choices in Duke Xtreme, it will only appear in the game if the player enables the option for it.
Its primary method of attack is shooting lasers at the player and it will also spit venom and bite them if they get too close; the spit attack is very similar to the Enforcers. It takes slightly more punishment than the Pig Cop and Enforcer; according to its profile on the Duke Xtreme add on's menu it has twice as much health as them.
- The King Cobra uses the same sound files as the Enforcer when taking damage, etc.
- It is a counterparts to the Pinky demon and Spectre from Doom.