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Still room for improvements.
—An Opus Tank driver recommends his own features to the infantry

The Opus Custom Tank is the main battle tank of the Epsilon Headquarters.

Official description

The research branch of Epsilon Headquarters have always attempted to take military technology one step further. Combining the best of the Lasher's and Mantis' features, it was supposed to be the most flexible MBT in the world and one of Epsilon's finest works in conventional weaponry.

However, the demands for the tank kept changing and when the time came to allocate all engineers and scientists to work on Yuri's main project in the Headquarters base, a tank emerged that sported a bizarre and untested experimental turret which would allow an additional passenger to operate a second barrel, similar to the Chinese Qilin Tank. The Opus was quickly put into production with only basic testing done.

Much to everyone's surprise, the tank turned out to be a perfect addition to Headquarters' infantry batallions, allowing the proselytes to bolster the firepower of their tanks while simultanously providing refuge and easily accessible safe transport for their infantry.[1]


From left to right: normal Opus Tanks and Opus Tanks with passengers

The Opus Tank is possibly the most versatile main battle tank in the Epsilon Army, if not the entire war due to its dual purpose as a transport. This trait enables an Epsilon Headquarters proselyte to have a more durable and firepower-oriented option over the Stinger while having the same tier requirement. It also enables said subfaction to surprise their opponents with infantry they won't expect in a midst of a battle such as Epsilon Adepts or even Rahn. However, if a proselyte only wishes to purely bolster the firepower of these tanks, Initiates are the cheapest option, with only a total of $850 for each Opus Tank with an Initiate inside.

Devious HQ proselytes are known to load these tanks with Brutes to ensure maximum carnage against armored columns lacking anti-infantry weaponry. While Spooks (and Bloaticks before version 3.3.3) are unable to activate the secondary turret, this can be exploited by a proselyte to fool opponents into thinking that they are sending Opus Tanks without any passengers.

The Opus Tank can easily contend with its Allied and Epsilon counterparts, as they all have either similar or inferior armor when compared with HQ's MBT. While lacking the potential to match up against the heavier Soviet and Foehn tanks, Opus Tanks can compensate with their cheaper costs, faster movement speed, and the infantry onboard surviving to continue the battle after its ride has been destroyed.

AI behavior

Opus Tanks controlled by the AI have the following attack patterns:

All difficulties

  • 1x loaded with Initiate then proceed to enter Tank Bunker
    • This task force may be accompanied by 1 additional Opus Tank with the same passenger
  • 4x targeting vehicles
    • This task force will only be constructed if a Pandora Hub is not present
  • 6x targeting vehicles or structures


  • 2x targeting vehicles, accompanied by 2 Shadow Tanks and 2 Colossi


  • 4x targeting vehicles, accompanied by 6 Brutes
  • 4x targeting vehicles, accompanied by 2 Shadow Tanks


Opus Tanks can now be mass-produced. Send a soldier inside to let him operate a second barrel.
—Epsilon intel during Operation: Metaphor

Act Two

  • The first Opus Tank prototype appears in Lizard Brain. It, along with four other vehicle prototypes, must be escorted to safety from an attack of the European Alliance. The Opus is the only prototype that is fully functional in this mission.
  • In the Act Two single player campaign, the fully operational Opus Tank only debuts on the battlefield in Thread of Dread before being buildable in Special Ops mission Split Seconds, and Unthinkable.


  • The Opus Tank becomes controllable and buildable in Metaphor chronologically.


  • Effective against armored vehicles.
  • Reasonably inexpensive ($700).
  • Can crush infantry and fire on the move.
  • Can transport one infantry.
  • Doubles firepower when loaded with infantry.
  • Not as effective against infantry.
  • Vulnerable against aerial and anti-armor threats.
  • Inferior to heavy tanks, unless used in large numbers.
  • Weak firepower without loaded infantry.


  • The sound effect that is used when a passenger enters/exits the Opus Tank is the same sound effect used by the Hammer Tank from Red Alert 3 when it acquires a weapon using it's "Leech Beam" ability.
  • The Opus Tank's firing sound is identical to that of the Tsunami Tank from Red Alert 3.

See also