Type 120 O-I
Kaiju of steel
Faction Icon Japan Japan
Class Super-Heavy Tank
Warmode 1945+
Cost $55
Research Cost $25
$75 (Nuclear mode)
Factory Prototype Base
Armor Base (Nuclear mode)
Armor Armor 4 60mm (400)
Speed 28 km/h

The Type 120 O-I was a super-heavy Japanese tank armed with a flamethrower, rockets, and a heavy 105mm gun. Its armor is equivalent of a Tiger. It was developed as a heavily armored, rolling fortress.

Although this is a robust tank, it should be deployed early to compensate for its painfully slow speed, to stop all possible invasions. However, its research price is a mere $25 to research, and can be deployed rather early due to it's lower price compared to other super heavy tanks (55$ instead of 60).


The Japanese O-I experimental super heavy tank had three turrets and weighed 120 tons, more than any of the German Tiger tanks, but less than the 188 ton Maus or rival 140 ton E-100. It was 10 meters long by 4.2 meters wide with an overall height of 4 meters. The armor was 200 mm (8 inches) at its maximum. The tank had a top speed of 25 km/h (15 mph) and was crewed by eleven men. This first version had two 12 cylinder gasoline engines each developing 550 PS @ 1500 rpm.

It has been reported that a single copy of the O-I was manufactured before the end of the war and was shipped to Manchuria, according to an engineer concerned with the project. Generally unknown, the O-I is a mystery, like the Krupp Kugelpanzer which was similarly shipped to Manchuria in 1945. Rumors also state that two prototypes were built but not completed by the end of the war. The tank model in R.U.S.E. is actually that of the O-HO, but it is referred to as the O-I for some reason.

Strategies and TacticsEdit

  • Research and develop early, have a scout escort for any oncoming surprise attacks, as surprise attacks are very lethal and are used frequently to stop any super-heavy tank invasions.
  • Even though this tank has immense firepower; do not take it face to face with any other super-heavy tank unless you clearly outnumber them, even the French FCM F1. Even though you may outnumber a Maus, the Maus still outclasses the O-I. However 2 or 3 O-I, or a single O-I with the Japanese advanced tank destroyer, will destroy the Maus.
  • The maximum range with the O-I is by using its rockets. The O-I would have to get closer to shoot its main turret, which can lead to destruction if another super-heavy tank has a greater range.
  • The sheer size of the O-I can be misleading, giving you the assumption that it can face enemy heavy tanks easily. Even the lightly-armored (in the field of heavy tanks) Italian Carro P26 in small groups can take out the O-I.


Weapon Infantrynoicon Engineernoicon Buildingsnoicon Armor1yesicon Armor2yesicon Armor3yesicon Armor4yesicon Armor5yesicon Aircraftnoicon Rangeicon
Adv. large cal.
AP shell
500 200 100 50 25 20 500m
Weapon Infantryyesicon Engineernoicon Buildingsyesicon Armor1yesicon Armor2yesicon Armor3yesicon Armor4yesicon Armor5yesicon Aircraftnoicon Rangeicon
200 200 200 40 20 10 5 2 300m
Weapon Infantryyesicon Engineernoicon Buildingsyesicon Armor1yesicon Armor2yesicon Armor3yesicon Armor4yesicon Armor5yesicon Aircraftnoicon Rangeicon
Light rocket
70 70 70 14 80 100 150 300 800m


See AlsoEdit

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