Designed to be a heavy bomber aircraft, the Hairbuster Riberts comes equipped with several forms of weaponry, such as guided missiles and bombs, making it a versatile weapon capable of quickly adjusting to the situation. More than a hundred units of these were produced, all in their testing stage. General Morden attempted to escape from the Regular Army troops in Ronbertburg City onboard a Riberts, but it was shot down by the Peregrine Falcons Squad. Unfortunately, Morden still escaped, caught in mid-air by a Flying Tara.
The players fight the Riberts in a train, with it flying at the same speed of the train. Its main attack method is to launch propelled missiles which have a number of patterns, such as going straightforward or making loops, from the bottom. It will also fly to the top-right corner of the screen, where it will drop a large amount of bombs that bounce on the train randomly, making them a little difficult to dodge. There is a cabin located at its side from which a soldier will appear in a turret that fires homing missiles. After the Riberts is nearly destroyed, General Morden himself will appear at the cabin, firing rockets from his bazooka constantly.
The Riberts makes an appearance in Metal Slug 3's final mission as the first mini-boss. The battle takes place during a flying segment, which makes dodging the Riberts' attacks somewhat easier, but it also makes returning fire somewhat harder. In addition, Morden is replaced by Allen O'Neil, who will use his trademark attacks instead: throwing grenades when the player is below the craft, firing his M60 when the player is at Allen's level, and using his knife when the player gets too close.
- The final retro-futuristic design of Hairbuster Riberts appears to be inspired by a number of XX century flying boats, however not necessarily biplanes:
- An early design of the Hairbuster Riberts would have used its jet engines as a form of attack, but it was unused due to the fact that it was impossible to keep this plane flying over the train at low speed.
- The earlier version of this boss may have resembled a Consolidated PBY-Catalina, which is a WWII armored aircraft and convertible vehicle and the Grumman G21 Goose and The Grumman Mallard
- The Hairbuster Riberts was introduced in Metal Slug Defense update 1.24.0. It costed 400 medals, the same cost as the Hi-Do. Its AP cost (600) which makes it tie with the Metal Rear. However, its movement speed is very fast, making it the fastest deployable boss unit in the game.
- The Hairbuster Riberts was also introduced in Metal Slug Attack originally as a Medal/VIP Crank unit. However, nowadays it can be obtained via Battle Monthly Reward. Its AP cost is now 500. Once its 2nd skill is unlocked, it is far more dangerous as its 2nd skill leads to a powerful suicide attack, which can easily wipe out weaker or stronger units.