Moon 11 is the final boss encounter in Mission 29: Selene, according to a walkthrough by Power Up Gaming published October 6, 2026. Its reported boss, the X-40 Nightmare, is best handled by staying fast, taking shots during recovery windows, and changing your target priority as the fight progresses. The walkthrough recommends an F-22A Raptor with QAAMs, but that is its suggested setup—not a proven best build for every player.
Where Moon 11 fits in Mission 29
Power Up Gaming’s October 6, 2026 walkthrough identifies Moon 11 as the final boss encounter in Mission 29: Selene, against an X-40 Nightmare. It describes a four-phase air-to-air fight involving aggressive high-G turns, post-stall maneuvers, escort UAVs, a burst-fire railgun, QAAMs, and a laser designator. These encounter details and tactics are the walkthrough’s account, not publisher-confirmed mechanics.
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The guide reports a 30-minute mission time limit. Treat that as the walkthrough’s claim rather than an independently verified or official timer.
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Power Up Gaming recommends the F-22A Raptor with maximum-ammunition QAAMs, plus either 4AAM or HCAA to deal with UAVs. It also lists parts intended to improve maneuverability, missile guidance, target identification, and self-defense. The walkthrough does not provide controlled comparisons or performance results, so consider these a suggested build rather than a universal optimum.
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Bandai Namco’s September 25, 2026 aircraft and loadout overview advises tailoring aircraft and special weapons to each mission and paying attention to the briefing. That general guidance supports adjusting your setup to the encounter; it does not verify the walkthrough’s specific F-22A recommendation. Read the official ACE COMBAT 8 site for current game and platform information, and the publisher’s aircraft and loadout overview for its loadout guidance.
How to fight the X-40 Nightmare
Keep speed and avoid drawn-out pursuit
The walkthrough’s central advice is to preserve speed and avoid long extensions behind an opponent that can turn sharply or use post-stall maneuvers. Rather than staying in an unproductive chase, hold a position that lets you re-engage and watch for a predictable path or a recovery after a hard maneuver.
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Fire when the boss gives you a window
Use missiles when the X-40 presents a favorable rear or side opportunity. At close range, the walkthrough recommends using guns, especially when the aircraft is recovering or following a more predictable path. This approach makes each attack depend on an opening instead of spending missiles during a prolonged pursuit.
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The reported encounter includes QAAM attacks and a laser designator. Power Up Gaming advises using cloud cover or flares against locks. Avoid treating a single defensive response as a substitute for movement: maintain speed and be ready to reposition when the boss turns or attacks.
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Change your target priority as phases shift
The walkthrough describes the fight as four phases, with UAVs and detached sections changing what deserves attention. Its key distinction is whether the UAVs are providing a barrier and whether the boss has shifted into the detached-aircraft sequence.
- When UAVs form a barrier: Destroy them to open a clearer attack opportunity, using the anti-UAV special weapon you selected.
- When sections detach: Keep pressure on the detached aircraft sections rather than assuming the fight remains a single-target chase.
- In the final close-range sequence: The guide advises aggressive gun use and targeting the nose unit and its laser designator.
Those priorities reflect the sequence described by the walkthrough. If your encounter differs, use the visible threat and target indicators to decide whether the barrier, a detached section, or the nose unit is the immediate priority.
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Quick checklist before the attempt
- Review the Mission 29 briefing and adjust your aircraft and special weapons to the mission.
- If following Power Up Gaming’s setup, take an F-22A Raptor with QAAMs and choose 4AAM or HCAA for UAVs.
- Stay fast, avoid extended low-value chases, and attack during recovery or predictable movement.
- Use missiles for favorable rear or side shots; use guns when you can get close.
- Destroy UAVs when they create a barrier, then shift attention to detached sections and the final nose-unit sequence.
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