The short answer
ACE COMBAT ONLINE is the multiplayer mode within ACE COMBAT 8, with its own progression and save data. Bandai Namco confirms cross-platform play in its full-launch announcement. Co-Op Assault and Co-Op Warfare use two teams of four; their objectives differ. This does not establish co-op support for the story campaign.
Choose the experience you want
| Mode | Published structure | What you are doing |
|---|---|---|
| Co-Op Assault | Two teams of four | Fight NPC targets and compete for the higher score. |
| Co-Op Warfare | Two teams of four, plus NPC forces | Fight opposing pilots and NPC units across a shared battle. |
| Scramble | Four-player special mission | Fight a powerful NPC squad. |
| Emergency Sortie | Up to eight players | Join a battle against a series superweapon. |
| Limited-time PvP events | 4v4 or eight-player free-for-all | Play the announced deathmatch formats when the event is available. |
Keep your campaign and online hangars separate
The publisher says the playable roster is shared between campaign and online, but online aircraft must be acquired through online rewards. Mercenary rank opens access to more aircraft; aircraft that survive sorties gain levels, which can improve stats and unlock abilities. Exact rates and requirements remain unconfirmed.
Cross-platform multiplayer is confirmed by the publisher’s October 2 launch announcement. Cross-save, account-linking procedures and the exact friend-invite flow have not been established by this guide.
What the Air Base is for
The publisher says the Air Base lobby accommodates up to 100 players. It is a social and matchmaking hub; that number is not the size of a combat match.
The reveal also describes a training mode for up to four players. Check the current in-game party and invite menus before following any claimed step-by-step setup procedure.
October 9: matchmaking checks and planned fixes
The ACE COMBAT Team says it is preparing fixes and gameplay adjustments, but has not finalized the update contents or release schedule. This is a plan, not a shipped patch or confirmed repair.
For online matchmaking, the team says unsupported environments may contribute to connection instability. It asks PC players to use Windows 11 and install the game on an SSD. Those conditions already appear in the published requirements; they do not establish the cause of every failed match or guarantee that changing a setup resolves it. Kingy has not tested matchmaking recovery.
Ver. 1.01.002: online fixes
The October 20 notes for Steam Update Data Ver. 1.01.002 list these ACE COMBAT ONLINE changes. The team’s November 2 notice calls 1.01.002 the latest patch, so it is live on Steam, but the fixes are not live until the update installs. The notice gives no console timing, and Kingy has not tested these fixes.
The team also says menu and UI improvements for ACE COMBAT ONLINE will arrive gradually in later updates, without dates.
| Area | What the notes say changes |
|---|---|
| New account | Fixes being unable to move past the screen after creating an account. |
| Controller disconnect | Fixes the game not recovering after a controller is unplugged and reconnected during the mission start sequence. |
| Social features | Fixes some Social features not working; the notes do not name which. |
| MILITARY TRAINING landings | Fixes some actions during landing stopping the landing from counting. |
| ARCADE GAMES | Adjusts some on-screen display elements. |
| ECM, ESM and IEWS | These SP weapons’ effects last a shorter time online. The notes give no new durations. |
ST-3100001 during ACE COMBAT ONLINE
The ACE COMBAT Team’s September 30 notice says ST-3100001 can interrupt ACE COMBAT ONLINE when communication with the game server is lost. For this Windows online-mode error, it asks players to check for a discrepancy in the Windows clock, synchronize the time, then test again. This is a developer-suggested check, not a confirmed repair or a general campaign crash explanation.
ACE COMBAT ONLINE is part of ACE COMBAT 8 but has separate progression and save data. The notice does not establish a console fix, a cause of unrelated connection errors, or a recovery outcome.
- Record the exact error code, platform, time and game version.
- On Windows, check and synchronize the system time using the operating system’s time settings.
- Retry the online session once and record whether the same code returns; use the official support route if it persists.
Threat Level changes the risk
In Co-Op Warfare, scoring without being shot down increases Threat Level. Higher stars increase scoring rewards and make your defeat worth more to the other team. Three stars grants Ace status.
That makes survival a consideration when choosing your next engagement. Specific scoring multipliers and optimal tactics have not been tested here.
Season One: choose a pass and redemption window
The October 1 publisher article describes a 100-level Season One pass. Premium and Premium Plus redemption unlocks ADFX-02 Morgan–PIXY and its special skins; Plus also unlocks the first 30 levels and their normal and premium rewards immediately.
Both tracks progress through mission XP. The publisher asks Morgan–PIXY buyers to redeem before the end of November. No exact end time, next-season rewards or later aircraft sale date is confirmed here. This is a published offer comparison; Kingy has not tested redemption.
Seasonal progression and availability
ACE PASS progression uses XP earned through online missions. The publisher describes two-month seasons and paid tiers with additional rewards. It also says playable aircraft DLC included in a Premium Ace Pass will be sold separately after that season ends. The source does not establish the later price or exact sale date.
Special missions and limited-time events should not be treated as always available. The mode overview is an announcement reference, not a live event schedule or server-status monitor.