Ace Combat 8 S-Rank Guide: How Mission Grades Work
Ace Combat 8 mission scores reward speed, target destruction, and mission goals. No damage adds 5,000 points and a named ace adds about 2,000. Ace of Aces needs S-rank on all 30 missions; players put Mission 28 S-rank at 150k to 160k points.
Grades Reward Speed, Not Just Destruction
A common mistake is treating a mission grade as a tally of how much you destroyed. In Ace Combat 8 the score is only half the story; the grade is driven as much by how quickly you clear the mission and how efficiently you take out the key target groups. Completion time carries heavy weight, and rushing straight at the objective usually scores better than lingering to mop up minor contacts.
This is why a fast, focused run often outruns a slow, thorough one. The campaign spans a Prologue plus 30 numbered missions, and the later sorties are where the time discipline matters most.
How the Score Is Actually Built
Per PowerPyx's S-Ranks walkthrough, a mission grade weighs four things: completion time, enemy destruction, bonus targets, and mission-specific objectives. Two bonus categories are documented. A no-damage run adds 5000 bonus points, and a confirmed enemy ace kill adds about 2000. There is no published numeric cutoff per mission, so do not chase an exact target number; the reliable rule is simply to finish fast, hit the bonus targets, and avoid taking damage.
The endgame milestone is the "Ace of Aces" trophy, which unlocks for earning an S-Rank on Ace difficulty across all 30 campaign missions. S-Ranks can be earned in Free Mission mode with custom aircraft, so you can build up to them after you know each layout rather than forcing them on a first playthrough.
What the Community Reports for Mission 28
The one mission with a well-documented grade threshold is Mission 28, the shadow squadron sortie. Player reports peg the S-rank cutoff around 150k points, with high-tier clears ending with 11 minutes on the clock and scores exceeding 190,000 points. The strong consensus is that completion time, and specifically how quickly the shadow squadron is downed, is what pushes a run across the line.
That means the practical approach to Mission 28 is to ignore incidental targets and go straight at the shadow squadron as fast as your airframe allows. A slower run with a slightly higher raw score can still fall short of an S if it spends too long.
What the Grade Actually Rewards
The grade is not a pure destruction tally. It weighs how quickly you finish and how efficiently you remove the key target groups, which is why a fast focused run often outruns a slow thorough one. Across the campaign's 31 sorties, that habit compounds: the same speed discipline earns better grades, faster MRP, and cleaner Assault Record replays.
The one threshold players document in detail is Mission 28, where the S-rank cutoff sits around 150k points and completion time is the deciding factor. Treat that as the template for every mission: go straight at the objective, use the right special weapon, and do not linger on minor contacts. The finale, Mission 30 "Song of Wings," rewards the same approach, since it closes the long campaign and demands a clean, fast finish.
Practical S-Rank Habits Across the Run
Because time is the dominant factor, build habits that shorten clear times:
- Fly straight to the objective cluster. Detours to hunt weak contacts cost more grade than they add in score.
- Use the right special weapon for the target. Bring the LACM against ships and land destroyers, and the SOD against dense clusters, so each pass removes more.
- Prioritize the named or heavy units. Key target groups swing the score more than generic fodder.
- Replay on a difficulty you can clear fast. Once you know the layout, a quicker clean run beats a cautious one.
Replaying for Grades
If you are hunting higher grades on a mission, do it from Free Mission once you know the route, and bring the aircraft and special weapon that clear its main target fastest. Keep in mind that the same missions are also where the 31 conditional named aces spawn on Veteran difficulty or higher, so plan those replays so you can work toward both a better grade and an Assault Record in the same sortie.
How Grades Fit the Rest of the Run
The grading system also interacts with the rest of what you are doing in Ace Combat 8. Because the campaign is built from a Prologue plus 30 numbered missions, and because 83 Assault Records sit on top of those sorties, you rarely replay a mission for a single reason. A better grade, a missing conditional ace, and an MRP farming route often live in the same sortie.
That is why time discipline matters: a faster, cleaner run does not just push the grade higher, it also shortens the grind when you are replaying missions to bank MRP or to spawn one of the 31 conditional named aces on Veteran difficulty. Treat each replay as multi-purpose, and bring the aircraft and special weapon that clears the main objective fastest rather than the one that looks best on paper. The campaign is built from a Prologue plus 30 numbered missions, so you are never far from the next objective, and a committed quick run beats a slow cautious one for grade and for MRP alike.
For the weapons that shorten these runs, see the Special Weapons & Loadouts guide, and for funding the aircraft that clear missions fastest, see the Fast MRP Farming Guide.