Using the data disc stolen from the Regular Army, the Ptolemaic Army developed their own variations of the original Metal Slug tank. One which was solely armed with a cannon, whilst the other is armed with vulcans. They also created the heavily-armed Black Hound and the massive Metal Rear using the stolen data.
Ptolemaic Slug equipped with a cannon. The cannon design is different and much smaller than the SV-001. It has better jumping ability due to a lighter chassis.
Ptolemaic Slug equipped with Vulcans. The main turret has been replaced with an eye sensor for improved accuracy.
An improved variant of Ptolemaic Slug designed for extreme environment. This variant is a bit more durable than the regular cannon model. Appears Metal Slug Attack,
Seen in Metal Slug Attack, this variant has a gold-painted chassis is the most durable. It fires high explosive incendiary shells that burn when they hit the ground. It can also jump to dodge enemy attacks.
A variant of the Ptolemaic Slugs which most resembles the SV-001. It is equipped with both a Vulcan and a cannon in addition to a mortar and a laser gun mounted on a mechanical arm that comes out of the turret hatch. It was being tested at the Corridor of Fire for its performance, but it malfunctioned and went rampant, eventually killing the Ptolemaic Infantries testing it.
- Both variants are also included in Metal Slug Defense and Metal Slug Attack; the Cannon variant as a purchasable unit, the Vulcan variant as an unreachable enemy unit. On the contrary, the Vulcan variant was introduced as a playable unit first in Metal Slug Infinity.
- No soldiers are seen exiting these Slugs when they are defeated suggesting that they could possibly be unmanned vehicles, like the Black Hound, or the pilots are killed inside.