Currently, the Allied missions are divided into four types: Act One, Act Two, Special Operations and Cooperative. There are 40 released Allied missions in total, including 28 campaigns and 12 cooperative missions.
Red Dawn Rising
- Main article: Red Dawn Rising
Hungering for revenge, the Soviets launch a full-scale invasion on the United States of America. The Peacekeeper network has been shut down under mysterious circumstances and the only thing stopping the Soviets is a mere ocean.
Eagle Fly Free
- Main article: Eagle Fly Free
The Allied Air Force Academy in Colorado Springs has been captured by numerous Soviet forces, crippling Allied air superiority. The Americans send in their top operative, Special Agent Tanya, to retake the campus.
- Main article: Road Trippin'
Latin Confederation's Jaguar Tanks are approaching from the south, pushing up through Mexico. The American armored forces are still battling Russian tank divisions, leaving the defense of the border up to a squadron of Stormchild fighters and a group of brave soldiers.
Heaven and Hell
- Main article: Heaven and Hell
The Soviets have captured an American naval base in Florida as a part of their invasion plan, severely limiting Allied marine activities along the East Coast. A strike team is deployed in order to weaken the Soviets in the region and retake the harbor.
- Main article: Bad Apple
Contact with the Allied troops is inexplicably lost during an attempt to reclaim New York City from the Russian forces. A special team is dispatched to investigate the situation, reestablish communication, and assist if necessary.
- Main article: Beautiful Mind
The Soviets are deploying more Psychic Beacons in order to subjugate their enemies. While trying to discover why the devices' influence is expanding, the Allies locate a structure that enhances mind control and launch a desperate attempt to destroy it.
Hammer to Fall
- Main article: Hammer to Fall
With the help of their Japanese allies in the Pacific Front, the Americans insert Special Agent Tanya near a base believed to be part of a uranium supply route for the Russians in order to infiltrate and destroy the mining facility on Sakhalin Island.
- Main article: Wrong Side
Using intel gathered from Sakhalin Island, the Allies have discovered the location of several Soviet ICBM launchers holding the entire world at gunpoint. The European Alliance scrambles to destroy the launchers before they can be used against them.
- Main article: Zero Signal
In an attempt to quickly isolate the European Alliance from any outside help, the Soviets capture an old but essential communications array. Now the Allies must go head to head against the Soviets before they are overrun by the enemy forces.
- Main article: The Gardener
Contact with several Japanese scientists affiliated with the Paradox Project was lost after China invaded their country. A taskforce is deployed to locate the Kanegawa Scientists and safely evacuate them before the Chinese forces find them first.
- Main article: Panic Cycle
Due to complications during the relocation of Japanese scientists working on the Paradox Project to Germany, the Allies have no choice but to escort the scientists to the SteinsTech Lab through the Black Forest occupied by the Russian and Chinese forces.
- Main article: Sunlight
- Main article: The Mermaid
A disturbance in the Soviet 2-year old dominion and completion of a "chrono backpack" creates an opportunity for the Euro Alliance and Siegfried to extract Special Agent Tanya from the Soviet prison in city-turned-fortress Warsaw with a new suit.
- Main article: Puppet Master
Yuri returns from the dark and resumes the Psychic Amplifier project by constructing a device which threatens the safety of the London Fortress of Euro Alliance. Shortly after her recovery, Special Agent Tanya is dispatched to support the counter attack.
Stone Cold Crazy
- Main article: Stone Cold Crazy
Reports indicate Yuri's forces have managed to use his mind control to take over an Allied research facility run by the Soviets. The Russians have managed to complete the Allied prototype for the specialized Barracuda jet which the Allies intend to take back.
- Main article: Ghost Hunt
With the help of the Scorpion Cell and psychic illusions, Yuri constructs another Psychic Amplifier in northern Africa that may become a threat to the London Fortress. A taskforce is sent to reactivate an old US base nearby and take the device down.
- Main article: Bottleneck
Using a distraction to drive the Allied forces away, Yuri launched a surprise attack at the London Fortress, forcing the Allies to evacuate. Because of the Paradox Project's premature launch, the fleeing survivors have to change the course and regroup at the Isles of Scilly.
- Main article: Hysteria
The premature launch of the expedition finally takes toll, as the key Allied device is low on power and must be fully charged before continuing its flight. A large Epsilon base full of Bio Reactors in Canary Island's Tenerife becomes a potential power source for the device.
- Main article: Stormbringer
A surviving Pacific Front task force in Central America sends an S.O.S. signal, requesting assistance in protecting the device they've been working on while offering access to a rich array of new technology and arsenal in return. With the Chronosphere, Siegfried's task force arrives to the rescue.
- Main article: Paranoia
With the Paradox Engine hiding over the Atlantic, Yuri prepares a Psychic Amplifier to revert the effects of Pacific Front actions in America, steal the Weather Controller and use it to destroy the Engine. Special Agent Tanya, accompanied by an unusual ally, is chronoshifted nearby to take it out.
- Main article: Relentless
A major Epsilon naval base allows Yuri to control most of the Atlantic Ocean, posing a threat to the Paradox Engine. It also act as an important communication junction for all Epsilon forces in the world. The Allies attempt to kill two birds with one stone by launching a massive attack.
- Main article: Insomnia
The time has come. Yuri's primary base, his largest settlement in the world, the Epsilon Headquarters, has been revealed. United, the Allied Nations begin their quest to destroy it with the use of the Paradox Engine and stop the madman's diabolical devices, before the free world is completely lost.
- Main article: Withershins
This mission is not yet available in the current version of Mental Omega.
- Main article: Hamartia
- Main article: Digital Demon
Suppressed repeatedly, the Pacific Front is in danger of disintegration. Before evacuating to a safer place, Norio Tomokawa attempts to help the loyalists recover some of the lost technologies from a base, where a dangerous weapon activated by the Chinese and traitor forces awaits.
- Main article: Obstinate
Yuri's forces have captured Cannes by using Psychic Beacons to control a United States forces regiment in the city. As several K.I. Scientists, who can benefit the Paradox Project's completion, are still in the city, the Allies try to rescue them, and learn a thing or two about their new enemy.
- Main article: Convergence
As Norio Tomokawa and his task force attempt to join the counter-attack operations, an Epsilon blockade of the Panama Canal makes it impossible for them to reach the Virgin Islands. To answer the call for help, the heroes of the Allied Nations join forces together to deal with this crisis.
- Main article: Fullmetal
While Tanya and Norio are fighting in the Amazonia, the Allies deploy another task force in Africa, in order to gather more resources for their quest. An insurgency against Yuri's Epsilon is happening in Angola, where many Oil Refineries are in the hands of PsiCorps and the Scorpion Cell.
- Main article: Gridlock
After losing his Tactical Nuke Silos in the Amazonas Rainforest, Yuri plans to create a makeshift rocket loaded with nuclear payloads, and launch it from a city in South America against the Paradox Engine. Alerted, the surviving American forces from San Juan quickly react to the threat.
- Main article: Parasomnia
- Main article: Low Rider
Good Old Times
- Main article: Good Old Times
- Main article: Impersonal War
The Soviets are attacking Athens, home of veteran Nikos Stavros. He asks for deployment of a taskforce in Glifada to destroy the Soviet base in Greece and retake the city.
- Main article: Enforcers
- Main article: Technologic
Attack on Buggy
- Main article: Attack on Buggy
- Main article: Blut Royale
The evacuation of Berlin is almost complete, however the extraction of vital data is prolonging its completion. A group of brave soldiers are staying behind to face the Soviets.
- Main article: Mad Monster
- Main article: Downfall
Balance of Power
- Main article: Balance of Power
- Main article: Panzer Ace
- Main article: Hypothermia