An alien leader resembling a gigantic brown dinosaur or frog, The Overlord is provided with giant fangs and claws, big golden eyes of pure wrath, twin rocket launchers mounted on both shoulders and four long amphibian-like legs that allow it to crawl and maneuver around with relative ease and fastness despite its huge size.
Worst weapon choice:Shrink Ray (Immune), any others
It has 4500 hit points and is unaffected by the Shrink Ray.
The Overlord is much bigger than any of the other more common enemies (except the three other bosses), and as such is able to squish the player if they venture too close which will result in a instant death. His dual rocket launcher is very accurate as well as the fact he can fire rockets in quick succession; which means staying still would guarantee a very low survival rate for the player.
Though he does not actually feature in Duke Nukem Forever he is seen in the game's opening sequence which chronicles some of Duke Nukem's exploits in Duke Nukem 3D.
When Duke first encounter the Overlord, he'll utter "I'll rip off your head and shit down your neck!". Upon death Duke will say, "Die, you son of a bitch!". The corpse of a boss cannot be destroyed, i.e. gibbed, compared to the common enemies encountered in the game, and will remain so until the level ends. The same dying animation will show regardless of what weapon the player used to defeat a boss.
Because of the Overlord's large size, it cannot enter any small spaces.
While the Battlelord cannot step on any water surfaces, and therefore cannot submerge itself, the Overlord can, which can easily be seen in the Zoo level. This was fixed in Duke Nukem 64.
As with the Cycloid Emperor and the Alien Queen, basic programming was just copied from the Battlelord, and there is a leftover of a Mini Battlelord in the Overlord. The Overlord has the same appearance as the Mini Battlelord while in another pallete, it has 1 hit point and will die instantly. Also, the rockets launched from the Overlord don't spawn correctly and thus will kill it. Lastly, the Overlord will not come back after being frozen by the Freezethrower.
Interestingly, the statement that Duke says at the beginning of the fight actually carries over to the end; after the Overlord is killed, Duke will rip off its head and shit down its neck, whistling merrily whilst reading the newspaper.
In the N64 port of Duke Nukem, Mini Overlord can be found in Hotel Hell and Freeway (Come Get Some & Damn I'm Good diffculties only)
In Duke Nukem 64, the Overlord level is separated into two parts (named Dreadnought and Overlord in that order) after that the player falls into the boss arena, and as such the Overlord is fought only in the arena. Also, it takes twice the damage to kill than the Battlelord.
A prototype version of the Overlord can be seen on the Duke Nukem 3D box cover in a prototype version of the Overlord level. It is similar to the early sketches (see above) with dual-barreled guns placed on its lower.
The data name of the Overlord is "BOSS3" while the Cycloid Emperor is "BOSS2" suggesting that it was created at a later date, most likely after the Cycloid Emperor was finished. The code is also different from the Battlelord opposed to the Cycloid Emperor and as such it is missing the anti-water sector data and freezing data from the Battlelord.