Infinity follows a plot similar to that of Ace Combat 04: Shattered Skies. The game takes place in 2019, 20 years after the Ulysses Disaster. The player flies as Reaper, a pilot belonging to the Bone Arrow Squadron operating with the United Nations Forces to keep the world safe from a terrorist threat brought on by the events of the Ulysses Disaster. The game takes many elements from past Ace Combat games, from super weapons to aircraft to background music.
The game is exclusive to PlayStation 3, will be free to download and play (restricted by the Sortie Fuel System), and will release in 2014. A public beta testing phase for Japanese PSN accounts was attempted in November of 2013, but shut down due to server issues. The game's story cutscenes were modified for unknown reasons and maintenance was performed on the servers. A second Japan-only beta began on December 12 and ended on December 19, followed by a worldwide beta beginning on February 4 and ending on February 11, 2014.
In 1994, an undiscovered asteroid - later named Polyphemus - collided with the 1986VG1 Ulysses asteroid, a moon of Jupiter. The result was a mass of over 10,000 meteors that were expected to impact the Earth in five years. With no method to change the orbit of all of the meteors, the world's nations banded together to create the Stonehenge Turret Network, a network of eight anti-air railguns that would fire at the meteors to prevent as much damage to the planet as possible. Six of these facilities were built around the world to defend each corner of the globe.
Unfortunately, in July of 1999, many of the asteroids crashed into the Earth regardless, causing a devastating loss of life in what was later known as the Ulysses Disaster. The world order began to fall apart, but a certain company named Wernher and Noah Enterprises assisted the world's nations in rebuilding efforts.
The game begins 20 years afterward. The refugee zones that were created post-Ulysses still exist, and a multinational network of terrorists known as the Sons of Troia are rising in power using the stockpiles of Wernher weaponry in each of the refugee zones.
They launched an attack on Tokyo using an upgraded version of a Wernher-made UAV known as the MQ-90 Quox. The Bone Arrow Squadron, a mercenary squadron owned and operated by Arrows Air Defense and Security, along with other mercenary squadrons, was hired by the United Nations after countries slashed their military budgets post-Ulysses, and they were tasked with defending Tokyo during the attack.
The terrorists launched another attack, this time on the Comona Base in the West Indies, which was involved in developing the OLDS as part of a project called Shattered Skies. Bone Arrow Squadron was called on once more to defend the base from hostile transports and fighters. After they defended the base, the Grey Men were kidnapped in Russia while the terrorists across all of the special zones began demonstrations around the weapon stockpiles.
At some point, the Stonehenge Type-3 network, located in Turkey, was likely occupied by the terrorists and used to attack the UNF. In response, the UNF launched a joint campaign between their Marine commandos, Bone Arrow Squadron, and Ridgeback Squadron, with the aim of destroying Stonehenge Type-3.
