The twist? The game introduced a "co-op versus" mode. Four players teamed up to eliminate ground and air targets (earning points), but halfway through the mission, a rival team of four players would invade the airspace. The final score determined the winner.
Unlike standard deathmatches, Infinity emphasized PvE (Player vs. Environment). Missions often involved destroying massive airborne fortresses like the Aigaion or Stonehenge (repurposed from Ace Combat 04 ). The "competitive co-op" format was unique: you wanted your team to win, but you also wanted the highest individual score. Ace Combat Infinity PSN