Mission Co-Op

Co-Op Mode is a multiplayer mode in Ace Combat: Assault Horizon, serving as the equivalent of the Co-op Battle DLC mode from Ace Combat 6.

This mode sees players, up to a group of three, joining to take on a series of eight remastered versions of missions from the main campaign. Before each mission, players will be able to choose from a variety of aircraft, their choice determining the task they will be assigned after the beginning for the mission - for example, players choosing attacker aircraft will be tasked with attacking ground troops, while fighter pilots will have to engage enemy air forces, However, aircraft selection is not limited, so players can select to fly aircraft of the same class if they choose to. This element emphasizes teamwork, since players will have to assist each other during gameplay.

The enemies featured in Co-Op are stronger than those in single-player mode. As well, new ace pilots never seen in the main game are introduced. If one player is engaged in Dog Fight Mode, the others can approach their target and engage in CRA, enhancing their combat capabilities. The same applies to Air Strike Mode, as assisting an ally engaged in an attack run will allow one to follow them from behind.