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.
- Mission description

Bottleneck is the fifth mission of the Act Two Allied campaign. The survivors from London are on the run. With a prematurely activated Paradox Engine, the Allies must secure a route to escape. This mission marks the debut of Siegfried's Chrono Legion, an elite assassin task force lurking in the darkness of time and space, preparing for the moment when the Allies will be ready to fight back against their oppressors.


While the Commander was away to destroy a Psychic Amplifier in Morocco, the Epsilon Army somehow infiltrated the London Fortress and launched a surprise attack, forcing the Paradox Project to be prematurely launched. The Project was initially intended to fly into Moscow and end the Soviets once and for all, but after their collapse under Yuri and his Epsilon Army, the Project's maiden flight will have to be abandoned as the Allies so far neither know yet where Yuri's main base is located nor they have any idea what Yuri is planning with Moscow. With no other choice, the Project's manifestation, a gigantic airship known as the Paradox Engine, along with her escorts, had to be moved into the open waters to give them a greater chance to survive.

The Engine's escorts incidentally comprises of the majority of the Allied army; the rest of the army are holding out on their own to defend London, although they will surely fall sooner or later, leaving the expeditionary force as all what's left of the Allied army. If the information which states that Yuri had at most one MIDAS ICBM left is true, Yuri will surely use it against either the London Fortress or the Allied expeditionary force once the Gladius System fails. Regardless of the possible outcome, the Allies must move forward to avoid a certain doom.

Meanwhile, Yuri had assigned the PsiCorps to set up an ambush on the Isles of Scilly by deploying several Gehenna Platforms and their navy as an anti-air blockade. It was clear that the Epsilon were going all in with this ambush; should the ambush succeeds, the free world will fall into darkness.

As their only hope, the Commander was sent with the newly debuting elite commandos, the "Chrono Legion", to secure the island and clear the way for the Paradox Engine and the Allied expeditionary force.


The Chrono Legion arrives

Shortly after overlooking the Isles of Scilly, the 'Chrono Legion', consisting of Chrono Legionnaires, arrives on the isles. As the London survivors draw near, the Legionnaires dispersed to simultaneously take down the heavy anti-aircraft defenses in the isles, particularly the Gehenna Platforms that will specifically target the Paradox Engine once it has arrived. However, they are protected by patrolling Epsilon forces, so the operation was not taken lightly.

The Paradox Engine arrives

Moments after clearing the Isles of hostile Gehenna's, the Paradox Engine arrives, being escorted by a third of the Allied Navy. A squadron of Harriers scouted the way ahead, revealing the positions of the Epsilon navy. Additional aerial reinforcements including Warhawks and Rocketeers arrived from the north and south of the Paradox Engine's position to engage with the rest of the enemy forces. Although they arrived in groups after groups, the Allied Destroyers and Dolphins made quick work of enemy Piranhas while the Aegis cruisers, Battleships and Aircraft carriers escorted the Engine from a closer range.

Destroying enemy forces

After the Paradox Engine made its way away from the Isles of Scilly, it initiated a time freeze, which helped the Allied navy clear the Isles of enemy forces that may have followed and destroyed the Engine. The rest of the Allied forces were able to catch up with the Paradox Engine shortly after securing the Isles.


We were able to get out from this dangerous situation with the Paradox Engine intact and fully operational. This won't last long, however, as the device has not been fully charged because of the emergency take-off. We must plan our course carefully.
- Mission debriefing

The Allies had managed to successfully defend the Paradox Engine as it escaped from the United Kingdom. However, not all is well. Because of the premature launch, and having to use the time stop twice in order to destroy Epsilon forces, the battery was nearly drained.

Power levels all throughout the ship were beginning to drop. Their first priority was to locate a good source of power to help the Engine to recover. After some searching, they managed to find a suitable place that was guarded by an Epsilon base...



  • The other Allied Commander's arsenal is based off of flying units and Destroyers, mainly Thor Gunships, Warhawks and Rocketeers.
  • The music used in the later stages of gameplay is Stranded in Space by XJMatt. Alternative link
  • The quote "Many Harrier pilots died to bring us this information" after a Harrier squadron scouted the path ahead for the London survivors is a reference to a similar quote in Star Wars: Episode VI Return of the Jedi.