Ace Combat 8 multiplayer is a separate mode called ACE COMBAT ONLINE. It supports cross-platform play on PC, PlayStation 5, and Xbox Series X|S, but it is not a co-op version of the story campaign. Online mode has its own save data, aircraft acquisition, upgrades, currency, and progression. Campaign aircraft and campaign progress do not automatically fill your separate Online progression.
The two permanent core modes are Co-Op Assault, a competitive PvE score attack, and Co-Op Warfare, a PvPvE battle involving players and NPC forces. Scramble, Emergency Sortie, Team Deathmatch, and Free-for-All Deathmatch appear as special or limited-time activities rather than replacements for those core modes.
For upgrade blockers, use the blueprint guide. The Emergency Sortie guide explains special cooperative offers; the ST-3100001 checks cover one specific connection error.
Version scope — October 7, 2026: This page was edited from supplied research. No numbered game build or independent playtest is recorded for this guide. Check the current in-game descriptions and your platform before applying build-sensitive conditions.
ACE COMBAT ONLINE at a glance
The Air Base serves as the central online lobby.
The Air Base is the central online hub. It can hold up to 100 players, but that does not mean battles support 100 pilots. Actual mission groups are much smaller, depending on the selected activity.
| Feature | What it means |
|---|---|
| Campaign co-op | Not supported; online co-op uses separate missions |
| Cross-play | Players can fight alongside or against pilots on other supported platforms |
| Air Base | A social and matchmaking hub for up to 100 players |
| Core modes | Co-Op Assault and Co-Op Warfare |
| Standard core match structure | Two teams of four pilots |
| Special PvE missions | Four-player Scramble and up-to-eight-player Emergency Sortie |
| Limited-time PvP | 4v4 Team Deathmatch and eight-player Free-for-All Deathmatch |
| Progression | Separate save data, aircraft acquisition, upgrades, currency, and ACE PASS XP |
| Aircraft roster | The same aircraft roster offered in Campaign, acquired separately online |
Inside the Air Base, you can access matchmaking and launch sorties. Military training supports groups of up to four players. The hub also contains a supply shop, the ACE COMBAT STORE, an arcade, a jukebox, chat features, and gates leading to additional Air Bases as online progress advances.
Treat the Air Base as a staging area, not as a battle mode. Use it to check your aircraft, purchases, progression, and party before entering the mission queue.
Prepare for your first multiplayer sortie
The safest starting approach is to separate what you know from Campaign Mode from what ACE COMBAT ONLINE actually tracks.
- Enter online mode expecting a fresh progression path. Your campaign save and online save are separate. Even though both modes use the same overall aircraft roster, aircraft must be earned again through online rewards.
- Check the mission type before choosing an aircraft. Co-Op Assault emphasizes scoring against NPC targets. Co-Op Warfare adds hostile pilots and a Threat Level system to the NPC battlefield.
- Review your equipped aircraft rather than relying only on its category. Fighters, Attackers, Multirole Aircraft, and Electronic Warfare Aircraft are designed for different combat roles, but the current information does not establish one universally best class or loadout.
- Coordinate target coverage when flying with friends. Avoid sending an entire four-pilot group after the same routine target while other objectives remain untouched. This is practical team advice, not a guarantee of a particular score or reward.
- Keep the mission objective ahead of personal dogfights. Both core modes are decided by score. Chasing one opponent or isolated target for too long can leave the rest of the battlefield uncontested.
There is no supported evidence here for a fixed best aircraft, mandatory four-player composition, or universal upgrade route. Your choice should respond to the active mission, available aircraft, equipped weapons, and the roles already covered by the other pilots.
Choose the right multiplayer mode
The word “co-op” can be misleading because both core modes still divide players into competing teams. The difference is whether the opposing team can directly attack you.
| Mode | Players and opposition | Main objective | Best fit |
|---|---|---|---|
| Co-Op Assault | Two four-player teams fighting NPC enemies | Defeat NPC targets and finish with the higher score | Players who want PvE combat with team-based score competition |
| Co-Op Warfare | Two four-player teams, hostile players, and air, land, and sea NPC units | Build the highest team score while managing PvP and battlefield targets | Players who want PvPvE and more direct risk from the opposing team |
| Scramble | One team of four against a powerful NPC ace force | Defeat the special enemy formation | A temporary co-op challenge when the mission appears |
| Emergency Sortie | Up to eight players against a series superweapon | Cooperate against a larger special encounter | A temporary raid-style challenge when available |
| Team Deathmatch | Two teams of four | Fight the opposing pilots | A limited-time direct PvP event |
| Free-for-All Deathmatch | Eight individual pilots | Compete against every other pilot | A limited-time solo PvP event |
Co-Op Assault and Co-Op Warfare are the dependable starting points because they are the two core modes. Special missions can appear randomly for a limited time while you play either core mode. No verified appearance probability or guaranteed trigger sequence is available, so do not plan a session around an assumed countdown.
Co-Op Assault priorities
Co-Op Assault is PvE, but it remains competitive. Both teams attack NPC forces, and the team with the higher score wins. It is therefore different from a private campaign mission where completion alone would be the only concern.
Start by dividing the visible battlefield into responsibilities. One pilot can pressure air targets while another addresses exposed ground or sea objectives, but adjust that division to the mission and the aircraft actually present. If several pilots are already committing to the same target group, redirecting to an uncovered objective may preserve more scoring opportunities.
Do not confuse a lack of direct enemy-player attacks with a guaranteed easy win. The opposing team is still building a score at the same time. Efficient target selection, reduced travel between objectives, and fewer duplicated attacks are sensible priorities. These are tactical recommendations rather than confirmed scoring formulas; the available information does not provide exact point values for individual targets.
Co-Op Warfare and the Threat Level
Co-Op Warfare combines two four-player teams with active air, ground, and sea NPC units. The team with the highest total score at the end wins. Fighting the opposing pilots is useful, but treating the entire mission as Team Deathmatch can leave valuable battlefield targets unattended.
Threat Level adds a risk-and-reward layer. A pilot earns stars by continuously destroying targets and scoring without being shot down. Higher Threat Levels increase the points awarded for defeating enemies, but they also make that pilot worth more points to opponents if shot down. Reaching three stars grants the title of Ace.
Use that information to make deliberate choices:
- If an enemy Ace is exposed, defeating that pilot may produce a valuable score swing.
- If you are carrying a high Threat Level, avoid unnecessary pursuits that isolate you from friendly support.
- If hostile pilots are tying up your team, another pilot can continue scoring against NPC targets rather than joining every dogfight.
- If your team already leads, protecting productive high-threat pilots may be more useful than forcing reckless engagements.
These priorities depend on the live score, targets, and pilot positions. A three-star title does not guarantee victory, and shooting down one Ace does not automatically decide the match.
Build a balanced online aircraft roster
ACE COMBAT ONLINE includes Fighters, Attackers, Multirole Aircraft, and Electronic Warfare Aircraft. The aircraft roster matches Campaign Mode, but ownership does not: every online aircraft must be acquired through rewards earned as a mercenary pilot in this separate mode.
A practical early objective is therefore to build options rather than spending everything toward a single assumed endgame aircraft. Keep at least one aircraft that suits the target mix you encounter frequently, then add alternatives as missions expose gaps in your roster. The evidence does not support a universal “best plane” for all online modes.
Category names can guide an initial choice, but they should not replace checking the mission and loadout. Co-Op Assault may present different combinations of air, ground, or sea targets. Co-Op Warfare adds enemy pilots without removing NPC objectives. An aircraft that feels comfortable in a dogfight may not be the most efficient answer to every scoring opportunity.
When flying with a regular group, compare roles before sortieing. Four individually strong selections can still leave the team poorly prepared if every pilot intends to pursue the same target type. A mixed roster gives the group more ways to respond, but no available information establishes a mandatory category composition or confirms that a specific electronic-warfare setup is required.
Online progression, currency, and the ACE PASS
Completing online missions earns progress within ACE COMBAT ONLINE. The mode tracks its own aircraft and upgrades, while ACE PASS XP advances a separate seasonal reward track. Keeping these systems distinct prevents a common misunderstanding: campaign MRP, campaign unlocks, online aircraft growth, and ACE PASS levels are not presented as one shared progression pool.
The Air Base supply facilities let you spend in-game currency earned through missions on aircraft, customization cosmetics, special boosts, and other items. Because the available information does not provide a complete price or upgrade table, avoid assuming that one purchase path is always fastest. Before buying, check whether the aircraft expands your mission coverage or merely overlaps a role you already own.
The free ACE PASS awards seasonal progression rewards. PREMIUM ACE PASS adds more rewards, including cosmetics, aircraft-upgrade items, and playable aircraft. PREMIUM ACE PASS PLUS includes the Premium rewards and a 30-level seasonal skip. The pass is scheduled to update every two months.
During Season 1, the Premium track includes the playable ADFX-02 Morgan–PIXY. Premium seasonal aircraft are planned to become separately purchasable after their corresponding season ends, but “planned” should not be treated as a guaranteed release date or price. The Morgan is not merely a cosmetic reward, and its online availability should not be confused with the conditions governing its Campaign use.
Handle special and limited-time missions correctly
Scramble and Emergency Sortie are temporary PvE opportunities that can appear while playing Co-Op Assault or Co-Op Warfare. Scramble sends four pilots against a powerful NPC ace formation. Emergency Sortie allows up to eight players to cooperate against major superweapons from the series.
When one appears, read its mission briefing instead of assuming your normal core-mode plan will transfer unchanged. A team built around fast score collection may need to concentrate more heavily on survival, target phases, or shared damage during a special encounter. Those are preparation principles, not claims about an unverified boss mechanic.
Team Deathmatch and Free-for-All Deathmatch are also limited-time events. Their presence should not be assumed outside an active event period. Likewise, the 100-player Air Base capacity should never be described as a 100-player deathmatch, and the existence of online co-op should never be described as a four-player story campaign.
The most reliable multiplayer plan is simple: use the two core modes for regular progression, maintain more than one useful aircraft option, protect your score rather than chasing every opponent, and treat special missions or PvP events as availability-dependent activities.