AI War 2 is the story of humanity and our allies 353 years after the First AI War. Preparations made against the AI's return failed, and now the AI is fighting the entire galaxy at the same time. It is winning. You control one of the last effective fighting forces in the Milky Way. Soon the AI will have nothing distracting it from dealing with you. The AI has blind spots and vulnerabilities it has forgotten in the years since it escaped human control. Find them and you might survive, or destroy the AI once and for all.
I feel like this paragraph as a whole needs a rework; it feels way too clunky for the paragraph that explains the whole premise of the game. Combine some of those sentences, add some commas, do something to make it feel less choppy. Perhaps:
AI War 2 is the story of humanity and our allies 353 years after the First AI War. Preparations that were made against the AI's return failed, and now the AI is fighting the entire galaxy at the same time. It is winning. (Maybe add something with a bit more oomph to this line to really stress how powerful the AI is?) You control one of the last effective fighting forces in the Milky Way, however, soon the AI will have nothing distracting it from dealing with you. Fortunately, the AI has blind spots and vulnerabilities it has forgotten in the years since it escaped human control. Find them and you might survive, or even destroy the AI once and for all.