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The Epsilon Army is a violent non-state actor led by Yuri, originating from the Psychic Corps, founded shortly after the Lenininsk Cosmodrome incident and fully dedicated to realize Yuri's vision of a world under one mind.

The Epsilon Army develops their own weapons research head-on through an array of unconventional and exotic technologies the world has never seen before, such as psionics and genetic mutation. At some point Epsilon claimed the Antarctica and built a base there from which Yuri's ultimate weapon is to be constructed.

The Epsilon Army is the renamed Yuri's faction from the original Yuri's Revenge and divided into three subfactions. Yuri's arsenal is expanded and balanced for multiplayer as well.


Pre-Third Great War

Prior to the Third Great War, Yuri, a remnant of Stalin's psychic legacy[1], founded PsiCorps and became an advisor to Premier Romanov. The PsiCorps sided with the Soviet Union to assist them in their so-called World Revolution by developing psychic technology.

Third Great War

PsiCorps participated in the war with their insidious mind control, which was used frequently during the invasion of the United States. While their Psychic Beacons and even a Psychic Amplifier were effective at first, the Allied defenders destroyed them, leading to the Soviets (including Romanov himself) to doubt the PsiCorps division.

Unknown to both the Allies and the Soviets, the PsiCorps worked independently for their own goals, and forged an alliance with a terrorist group known as Scorpion Cell.

With suspicions and failures rising, the PsiCorps finally defected from the Soviets when the Chinese began their invasion on Russian soil, taking their own psychic and cloning tech in the process.

In the last moments of the Third Great War, Yuri finally declared the founding of the Epsilon Army and his forces went into hiding for two years, in preparation for Yuri's grand ambitions. In the interbellum, the Epsilon built fortresses in Antarctica (founding Epsilon Headquarters) and even on the Moon.

Mental Omega War

The Epsilon Army commenced the Mental Omega War through their uprising. They launched an all-out attack in the Soviets' most important locations, killing Premier Romanov in the process. They continued to gain territory by means of mind control technology and wage war against the Soviet dominion.

Their momentum ceased when the Allies retaliated with their Paradox Engine, leading to enormous casualties across the African continent. In addition, China was impenetrable from the inside, so any infiltrations are impossible. These forced Yuri to send in his trump card, Libra, earlier to deal with these threats.

Due to the Allies' might and the threat Libra poses, Scorpion Cell rebelled against the Epsilon, causing even more turmoil. There, it is revealed that the Cell were responsible for the MIDAS theft two years ago due to their secret affiliation with the Chinese scientist, Yunru. The Epsilon retaliated with no mercy and brought down their primary base of operations, but Rashidi himself escaped via a prototype Jackal Racer. The remnants of Scorpion Cell were mind-controlled by a Psychic Amplifier that was reactivated.

The Epsilon is essentially on the defensive. With the Allies closing in on the South Pole and the Soviets invading Moscow, Yuri decided to transport himself to Moscow to distract the Soviets while the entirety of the Epsilon Headquarters hold for as long as possible from the Allied invaders, as well even capturing and brainwashing Volkov to turn against them. Unfortunately, he was ultimately killed during an attempt to escape via a Mandjet Transport by the Russians, finally achieving their revenge against their sworn enemy.

The Epsilon seem to be defeated, but eventually with the arrival of Libra and Rahn the Epsilon finally managed to crush the entire Paradox Engine strike forces ending with Libra using her psychic powers to destroy the Paradox Engine, which ends in Libra finally activating the Mental Omega Device, mind-controlling almost of humanity into her will with the exception of the still-growing Foehn Revolt, who had managed to retake Point Hope from the Epsilon forces and with the help of the Allied remants, overloading the Paradox Engine's time circuits, causing a time distortion.

Technology level

The Epsilon's weapon of mass destruction, the Psychic Dominator.

The Epsilon’s technology is as unconventional as their doctrine. Considering the rapid pace of their development (in fact, within only 2 years) for an organization that is founded in the late 1900’s thanks to Yuri’s unique method of connecting great minds[2], they are the pioneers of unimaginable feats that break both the technological and ethical limits that the Allies and Soviets wouldn’t dare pursue. As their preferred tactics are usually subversive, they rely on speed and stealth to corrupt the battlefield, and so most of their machines and soldiers aren’t able to handle direct combat for long. The following is a list of their notable technological breakthroughs:

  • Psionics: The most prominent and prized technology of the Epsilon (particularly its primary wing, the PsiCorps), it is what truly makes the Epsilon a threat to freedom and communism alike. Its most common (and most terrifying) example is their ability to control minds instantaneously by psychics, from the Epsilon Adept to the Mastermind. It does not stop there however, as the Epsilon is capable of mind controlling entire populations in little time, whether in a strategic or cataclysmic manner. They also possessed the technology to mind control entire continents if necessary. Other applications include pyrokinesis and telekinesis, as demonstrated in the Initiate common soldier and the PsiCorps heroine Libra respectively, proving that their Psionics technology is also capable of destruction if need be. Although experimental and never actually fielded on a larger scale, Yuri himself practised psychokinesis and utilized it to manipulate Volkov against his original masters during the final battle of Moscow.
  • Invisibility: A combination of the Allies' phase technology from the previous war[3] and psychic illusions that involve distorting the mental feedback of their enemies[4][5], invisibility has been the bane of many unsuspecting armies which do not have the necessary equipment to detect what lies behind the Epsilon’s cloak. Whether utilized for offensive or defensive purposes, it is proven reliable to force their opponents into thinking twice before assaulting their strike forces and their bases. Epsilon Headquarters are the primary fielders of this technology in the form of their Shadow Tanks and Hazequads.
  • Magnetic and anti-gravity technology: An important asset brought about by Yuri’s army, it is responsible for giving their aircraft their flight and levitation[6], and so they can be fielded even in the vacuum of space[7]. Besides this, PsiCorps is able to apply this technology to their Marauder and Magnetron vehicles to support their all-terrain mantra. As for magnetism, PsiCorps too also fields this more frequent than the rest so as to trap unfortunate machines, that make such vehicles the next pawns of Yuri’s great plan or simply nuisances to be disposed of by Epsilon's other insidious creations.
  • Chemical weaponry: Another unethical armament used by Epsilon, it has been known to be deadly against infantry no matter how armored they are, as they explode and release toxic clouds upon death. Scorpion Cell is fond of using toxic weapons against their opponents without hesitation, and so their most formidable units are well equipped with them.
  • Genetic mutation: First conducted towards Alcatraz Island prisoners[8] like the mad scientists with no regard for humanity’s self-imposed limits that they are, the Epsilon’s goal to transform mere humans into superhumans through genetic mutation has been successful and it never seemed to backfire. This has led to the creation of the Archer, Brute and Virus infantries seen in the battlefield. Epsilon Headquarters delved even further into this technology, and as such they are responsible for the creation of the Stalker and their hero Rahn. In addition, their development of the Terranova compound and amnesia rays enable the Epsilon to use genetics for offensive purposes.
  • Cloning: An application of genetics, the Epsilon are well known for cloning their own soldiers through Cloning Vats, effectively outnumbering their opposition.
  • Terminus: A peculiar drug that is an another application of genetics, the Epsilon has utilized this concoction to enhance the performance of Epsilon units that sends them into a state of rage, and has since become the support superweapon of the Epsilon, appropriately named the Rage Inductor.
  • Robotics: Robots affiliated with the Epsilon are only given special, niche roles as said faction widely prefers the organic mind over artificial intelligence.
  • Dissolver beams: As its name implies, it is capable of liquefying infantry and even corroding armor of tanks. Thus, it seems to have different amplitudes, based from eyewitness accounts that have fought against Invaders and Shadow Tanks. Epsilon Headquarters' Aerial Fortress Irkalla takes this cruel weapon to a new level, using its multiple arrays of this particular weapon to tear through air and ground targets alike.
  • Gatling weaponry: Putting conventional bullets to the extreme, Gatling weaponry is Epsilon’s basic method of mowing down fragile infantry and aircraft mercilessly. It is seen in both stationary and mobile forms.
  • Armor rupturing objects: AROs for short, they are roughly the Epsilon equivalent of rockets and missiles. As their name implies, AROs are designed to crack the armor plates of enemy vehicles and aircraft, as revealed in their Archer and Piranha units.
  • Advanced aerospace technology: Although their aircraft are rather unorthodox in design and weaponry, and are unlike anything else fielded by the other factions, they are nevertheless in a league of their own as they can operate in environments where conventional aircraft cannot - namely, the moon. Their Invaders, Basilisks, and Dybbuk-series of aircraft are a standing testament to Epsilon's mastery of this particular kind of technology.



Main article: PsiCorps

As the first branch and main military wing of the Epsilon, the PCicon.png PsiCorps focuses on extensive mind control tactics through their Masterminds and Psychic Towers to throw their enemies into disarray, and all-terrain warfare with their Marauders, Magnetrons and their heroine Libra.

Scorpion Cell

Main article: Scorpion Cell

Being a terrorist group means the SCicon.png Scorpion Cell had to rely on improvised weapons and vehicles made from scrap such as Speeders and Tyrants, but they also employ extensive use of chemical weaponry to even up the odds in form of Plague Splatters and Oxidizers as well as stealing enemy vehicles with Hijackers.

Epsilon Headquarters

Main article: Epsilon Headquarters

Dedicated to safeguard the Epsilon's Antarctican stronghold, the HQicon.png Epsilon Headquarters focuses on stealth tactics by using Shadow Tanks to ambush enemies from unexpected places, as well as genetic mutation through their Stalker supersoldiers and hero Rahn, culminating with the massive Aerial Fortress Irkalla to ensure complete territorial control.


  • Their name refers to the fifth letter of the Greek alphabet.
    • According to Speeder, this name was chosen because it contains "psi".
  • Their symbol is a congregation of three Hebrew alphabets, resh (ר), waw (ו), and yodh (י).
  • In version 3.0, the Epsilon possessed technologies such as chaos gas, infantry stun, plasma and railguns. These are now utilized by the Foehn Revolt since their debut in version 3.3, and the units/defenses that once used such technologies were given new armaments (such as the Railgun Tower, which is now replaced by the Inferno Tower), or a new purpose completely (such as the Dream Weaver, which is now called the Bloatick).

External links


  1. Story section in the official Mental Omega website
  2. Dybbuk-Evolver lore
  3. Shadow Tank lore.
  4. Chimera Core lore.
  5. Think Different text: "The Tech Center is here. It has data on the remnant phase technology from the old war. Combining it with our psychic illusions will allow Yuri to create an invisible tank of our own."
  6. Salamander lore
  7. Earthrise text: "Yuri's aircraft were designed with the intention to make them work on the Moon."
  8. Huehuecoyotl in-game briefing