Tani Oh

The Tani Oh ("Valley King" in Japanese) is the third boss from Metal Slug: Super Vehicle-001.

Series Information

The Tani Oh is a prototype heavy artillery tank, armed with two huge cannon capable of devastating large areas without much effort: these twin guns are possibly an experimental railgun, since their shots are instantaneous light bolts and the turret, instead of ejecting the expanded casings, discharges smoke and heat from the vents on its back. It is also equipped with two turrets on each side, both with a minigun and a mine launcher, to cover the tank in short range. Only one unit was produced, being used by the Rebels for testing purposes in the Käthehirt Valley.


The Tani Oh is a very simple, yet deadly boss. It moves in a lower platform compared to your character, so it will always be below you, forcing you to jump constantly (without the Metal Slug) to shoot at him. Its main weapon is its large double railguns, which not only covers a big area, but is also very fast. It also throws mines everywhere in your path and will sometimes use its miniguns to kill you. Having a Metal Slug while fighting the boss makes things a lot easier. Warning: If you blow up its two smaller turrets, it will constantly use its main laser turret, which goes a lot faster on its own, making the battle a lot harder.

Also, while you're fighting Tani-Oh and choose to continue, instead of a Heavy Machine Gun appearing, it will be a Rocket Launcher, which only happens when fighting this boss.

In Other Games

Metal Slug: 2nd Mission

The Tani Oh appears in Metal Slug: 2nd Mission for Missions 23 (The Tundra King) and 24 (The Ice Queen). The fight with the Tani Oh has two phases. First phase has the Tani Oh tossing range sensitive land mines onto the ground and occasionally shooting a rocket in three directions (center, diagonally left, and diagonally right). The second phase has the Rebels coming in from both sides and tossing grenades. The tank itself replaces its weapons with a laser that shoots vertically upward, which is dragged as the Tani Oh moves. The laser is able to hurt the Rebels, and they sometimes drop a gas tank as they are killed.

Metal Slug Defense

Tani Oh appears as a background boss in Metal Slug Defense in the Alaska stage in the world 6. When you fight the Tani Oh in MSD, the Tani Oh was placed in the bottom of screen. This makes it very hard to damage it. However, Tani Oh can easily be destroyed via The Keesi II, Cabrakan 's Laser and Crablops' Leg jet engines.

Metal Slug Attack

In Metal Slug Attack Tani Oh is featured as the Monday-Tuesday boss in the Day Specific Mission.

Tani Oh has a special playable variant made for the Extra Ops: Santa Trap, where its main cannon and mine launcher is facing horizontal in order for to fire its cannons against the enemy units in front.


  • The Mammoth Tank from the popular Command & Conquer series had a design similar to the Tani Oh. The quadruple treads and the dual cannons are the standout features.
  • Tani Oh's early design was based on British Churchil III heavy tank.
  • Another of Tani Oh's early design resembles the British FV215 heavy gun tank prototype, though upon closer inspection, it appears to be a German Panzer IV-esque turret on the chassis of a Churchill tank.
  • Its name (谷 王) means "Valley King".
  • Tani Oh is the only boss (and the only time in general) in the series that drops Rocket Launcher instead of Heavy Machine Gun when the players use a continue.
  • Tani Oh's pilot appears in Metal Slug SV-001 (Pachinko) and it's a woman named Leta/Letta. There is not much information about her other than her affiliation with the Rebel Army.
  • Interestingly, if you shoot at the Tani Oh's Landmines after being launched, the mines will bounce back and can damage the Tani Oh.


Metal Slug Tetsuyuki | Hairbuster Riberts | Tani Oh | Shoe & Karn | Iron Nokana | Hi-Do

Mini-Bata | Allen O'Neil

Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) | Aeshi Nero | Dragon Nosuke | Big Shiee | Hozmi | Rugname

Mosque Artillery | The Keesi II (X) | Allen O'Neil | Dai-Manji

Metal Slug 3 Huge Hermit | The Ten Commandments of Moses | Jupiter King | Sol Dae Rokker | Rootmars

Twin Ohumein-Conga | Monoeyes | Hairbuster Riberts | Hi-Do | Rugname

Metal Slug 4 Brave Guerrier | Toschka Dalanue | The Iron | Big John | Sea Satan | Amadeus Mother Computer

Mecha Allen O'Neil

Metal Slug 5 Metal Rear | Shooting Ray | Wall Crawler | Sand Marine | Evil Spirit Incarnate

Black Hound | Stone Turtle (unused) | Mammoth Tower | Ptolemaios (unused)

Metal Slug 6 Bull Drill | Iron Sentinel | Brain Robot | Sea Worm | Invader Queen

Invader Controller

Metal Slug 7/XX Worm Mecha | Crablops | Destroyed Crablops | Fall Mecha | The Union | Rebel Gigant | Kraken
Metal Slug: 1st Mission Rebel VTOL | Rebel Train | Macba | Rebel Zeppelin | Electromagnetic Crane | Weapons Port Boss | Hilde Garn

Facility Elevator | Macba | Rebel Truck

Metal Slug: 2nd Mission Big Bertha | Terrain Carrier | Rebel Reactor | Macba | Rebel Submarine | Tani Oh | Gunslinger | Rebel Submarine | Rebel Airplane | Hilde Garn's Slug | Rocket UFO

Rebel Rocket | Hyakutaro

Metal Slug Advance Formor | Emain Macha | Kaladgolg | The Keesi III | Cabracan

Allen Jr.

Metal Slug 3D M-3 Rocket Launch Support Van | Mosque Artillery | Spider-Bot | Underground Cruise Missile | Morden's Battleship | Morden's Castle | Allen O'Neil | Lugus | Lieu
Metal Slug Attack Pharaoh's Arc | Ball Slug | Great Mother | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma
Mobile games Rocket Control Room | Unknown Alien | Hellfire | Spiderbot | Cyclops | Mega Laser Turret | Mars Battle UFO | M-32 Water Carrier Plane | Kourai | Alien Floating Structure