In Metal Gear Solid V: Ground Zeroes and Metal Gear Solid V: The Phantom Pain, the reliable route to a high mission rank is simple to state but difficult to execute: finish the objectives quickly, avoid being detected, and do not let one mistake become a prolonged alert or a restart. Reflex Shot can rescue a single sighting, but it is an emergency window rather than a substitute for stealth.
The supplied title does not identify a game. The mechanics described here match Ground Zeroes and The Phantom Pain; details can differ by mission, mode, and platform version. The games do not present one universal public formula that lets you calculate every rank in advance, so the practical guide below focuses on the ranking factors the available reviews and guides consistently identify.
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The ranking rule in one sentence
Play as if every sighting, unnecessary fight, and failed attempt has a cost. Mark guards, choose a route through cover and darkness, complete the required objective without raising an alert, and keep moving. In Ground Zeroes, alerts, kills, and retries are specifically described as damaging the final score. In The Phantom Pain, stealth and speed are the main advantages for a top result, while avoiding Reflex and using nonviolent takedowns can improve the GMP payout.
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That does not mean you must crawl through every mission. A slow route can also miss a high rank if it takes too long. The best runs balance three demands: no detection, efficient movement, and complete objectives. Replay is part of the design, not a failure state; repeat attempts let you remove an alert, cut travel time, change equipment, and finish optional tasks.
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What “detected” means during a mission
An individual guard spotting you
The first important event is a guard noticing you. This is the moment that starts the short Reflex Shot window in Ground Zeroes. Time slows briefly, giving you an opportunity to disable or kill the guard before the sighting develops into a wider alert. If you succeed within that window, the alert does not propagate and that detection is prevented from counting in the end-of-mission ranking, according to the game’s documented review coverage.
Reflex Shot therefore changes the consequence of a mistake; it does not make being seen harmless. You still had to react immediately, and relying on the effect repeatedly creates more opportunities for another guard, camera, or patrol to find you. Treat the slowed-time sequence as a last-second recovery, not as part of your normal route.
A full alert and high-alert behavior
If you do not resolve the sighting in time, the enemy response can spread beyond the original guard. Reviews of Ground Zeroes note that enemies can remain on high alert for a substantial period. During that period, moving openly or trying the same approach again is more likely to produce another sighting. The practical implication is that preventing the first detection is safer than attempting to fight your way out after the alarm has spread.
A full alert is also expensive because it consumes time and often forces detours, combat, or a restart. Even when you survive, the disruption works against the speed and clean-mission goals associated with high ranks.
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Being hidden is not the same as being fast
Cover, darkness, and a route that keeps you outside likely sight lines reduce detection risk. They also let you maintain momentum. Stopping for every guard may preserve concealment but produce a time result that is weaker than a carefully planned bypass. The useful question at each obstacle is not “Can I eliminate this enemy?” but “What is the quickest route that keeps this enemy from reporting me?”
How the ranking loop weighs your choices
The games do not expose a single, complete scoring equation in the material available for this guide. Instead, the evidence points to a repeatable set of priorities.
| Factor | Ground Zeroes | The Phantom Pain | How to use it |
|---|---|---|---|
| Detection and alerts | Alerts hurt the score; a Reflex Shot success can prevent one detection from counting. | Stealth is a primary ranking advantage. | Plan to prevent the first sighting rather than depending on recovery. |
| Time | Running and gunning is strategically poor for high rankings because combat and alerts consume time. | Speed is identified as a primary ranking advantage. | Shorten the route only after you can repeat it without exposure. |
| Kills | Kills are described as a score penalty. | Nonviolent takedowns can increase the GMP payout. | Use restraint when the objective does not require lethal force. |
| Retries | Retries are described as damaging the result. | Replay is central to refining missions, but a failed attempt still wastes time and may affect the result you submit. | Restart deliberately when a run is no longer capable of meeting your target. |
| Optional objectives and collectibles | Replayable missions provide additional objectives and collectibles. | Replayable missions and S-rank routes encourage completing optional goals. | Decide whether the current attempt is for rank, an objective, or collection; combining them can make the route slower. |
“Not stated” should be the answer to any claim about a universal numeric threshold for an S-rank, a fixed alert penalty, or a guaranteed value for one particular weapon. Those figures are not established by the available evidence and can vary by mission.
Ground Zeroes: why a clean first pass matters
Prevent the alert instead of planning around Reflex
In Ground Zeroes, the strongest ranking habit is to make the first sighting unlikely. Mark guards before crossing an exposed area, wait for a patrol to move, and use cover or darkness to break the line of sight. If a guard nevertheless spots you, use Reflex Shot immediately and finish the encounter inside the brief slow-motion window. A successful response can stop the alert from propagating and keep that detection out of the final ranking calculation.
Once the alert has spread, the cost is broader than one enemy. You may have to hide until the high-alert state subsides, take a longer route, or restart. Each choice can reduce the time and cleanliness of the attempt, while retries are themselves identified as harmful to the score.
Do not mistake combat success for ranking success
You can complete a mission after an open firefight, but that is a different achievement from earning a high rank. The review evidence specifically identifies kills, alerts, and retries as factors that hurt the result. A lethal takedown that solves an immediate problem may therefore create a worse final score than a slower-looking bypass that leaves no alarm behind.
Use a separate objective for each replay
Because missions are repeatable, an efficient progression is to learn the map first, then submit a clean speed attempt. On another replay, collect an item or complete an optional objective. Combining every task in one run often forces extra movement and increases the chance of detection, which undermines an S-rank attempt.
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Speed matters alongside concealment
Tips for The Phantom Pain identify stealth and speed as the dominant ranking advantages. A route that never raises an alarm but takes far longer than necessary still needs refinement. Once you know where guards are positioned, remove pauses: mark targets while moving, use a direct line between cover points, and avoid detours that do not serve the current objective.
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Nonviolent takedowns have a financial benefit
The same guidance notes that avoiding Reflex and using nonviolent takedowns can increase the GMP payout after a mission. This is a payout incentive as well as a stealth tactic. If an objective does not require a kill, a quiet incapacitation can preserve the run and produce a better financial result than a lethal solution.
Do not read that as a promise that every nonlethal action automatically produces an S-rank. Rank and GMP are related outcomes of the same disciplined play, but the available material does not provide a universal conversion between a specific takedown and a specific rank.
Replay is the intended optimization cycle
The Phantom Pain is built around repeating missions with different equipment and routes. A first attempt can reveal patrol timing and objective placement. Later attempts can trade a tool that offers safety for one that saves time, remove unnecessary encounters, and add optional objectives once the core route is reliable. S-rank-focused walkthroughs exist because the target is not reached by one lucky recovery; it is reached by systematically eliminating wasted movement and exposure.
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A step-by-step route to an S-rank attempt
- Choose the purpose of the attempt. Decide whether this run is for the main objective, an S-rank, an optional task, or a collectible. A rank run should not carry extra detours unless the mission requires them.
- Scout before committing. Mark visible enemies and identify cover, darkness, cameras, patrol paths, and the safest approach to the objective. The goal is to know where the first sighting could occur.
- Build a no-alert route. Select a path that keeps you behind cover or outside likely sight lines. Prefer a route you can repeat consistently over a theoretically shorter route that depends on perfect timing.
- Move with a time target. After the safe route is stable, remove unnecessary stops and backtracking. Speed is part of the high-rank equation, especially in The Phantom Pain.
- Use the least damaging takedown. When force is optional, choose a nonviolent incapacitation in The Phantom Pain. In Ground Zeroes, avoid unnecessary kills because they are identified as a score liability.
- React decisively to a sighting. In Ground Zeroes, use Reflex Shot as soon as it appears and disable or kill the spotting enemy before the window closes. Do not wait to see whether the alert spreads.
- Abandon a compromised run when appropriate. If a full alert has created a long search, a firefight, or a route that cannot meet your time goal, restarting may be more efficient than trying to salvage that attempt. Remember that retries are also costly in Ground Zeroes, so restart only when the current run is no longer viable.
- Review the result and change one variable. On the next replay, alter one route, timing decision, or piece of equipment. Isolating changes shows whether you actually reduced exposure or time.
Choosing between common approaches
| Approach | Detection risk | Time to objective | Force used | Alert recovery | Best use |
|---|---|---|---|---|---|
| Unseen bypass | Lowest when the route is learned | Often fastest after practice | None | Not needed | Primary S-rank route |
| Nonviolent takedown | Low if performed from cover | Moderate; can be faster than waiting for a patrol | Nonlethal | Usually avoids escalation | The Phantom Pain runs where payout and stealth both matter |
| Reflex Shot recovery | Already compromised at the moment of sighting | Short-term slowdown, then continued movement | Disable or kill the spotting enemy | Can prevent propagation in Ground Zeroes if completed in time | Emergency correction, not a planned loop |
| Open combat | High | Unpredictable and usually slower | Lethal or heavy force | May leave enemies on high alert | Completion when rank is no longer the priority |
| Restart and replay | Resets the tactical situation | Costs an attempt | Depends on the new route | Removes the current alert state | Recovering a rank attempt that can no longer meet its goal |
What to do when a run goes wrong
You are spotted but Reflex Shot appears
Stop moving toward the objective, use the slowed-time window immediately, and resolve the spotting guard before the window ends. In Ground Zeroes, that can prevent the alert from propagating and keep the detection from counting. Once the immediate threat is handled, return to the planned route rather than improvising in the open.
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The base enters a prolonged alert
Break contact and hide instead of trading shots across the area. Enemies can remain on high alert for a substantial period, so rushing back through the same corridor invites another sighting. If the delay destroys your time target, restart and use the patrol information you gained.
The route is clean but too slow
Do not remove cover blindly. First identify where time is being lost: waiting for a patrol, taking a long detour, stopping to fight an irrelevant guard, or returning to a location. Then test one shorter alternative on the next replay. The objective is a repeatable route that remains unseen, not the shortest route on paper.
You completed the objective but the rank is disappointing
Check the attempt for alerts, kills, retries, and avoidable delays. In Ground Zeroes, all four can work against a high score. In The Phantom Pain, compare the completion time and stealth quality, then consider whether a nonviolent solution or a more direct route would improve the payout and ranking result.
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- “Reflex Shot means detection does not matter.” It is a brief recovery mechanic. It can prevent one detection from counting in Ground Zeroes only when you resolve the threat inside the window.
- “Finishing the objective is enough for S-rank.” High ranks also depend on the quality and efficiency of the run; speed and stealth are repeatedly identified as decisive advantages.
- “A successful firefight is equivalent to a successful stealth run.” Mission completion and mission ranking are different goals. Alerts, kills, and retries are specifically harmful to the Ground Zeroes result.
- “Every mission should be replayed the same way.” Replay is how you test routes, equipment, optional objectives, and timing. Deliberate variation is part of improving.
- “There is one universal S-rank number.” No universal numeric threshold is established here. Treat mission-specific results and your own replay comparisons as the practical feedback.
A compact pre-mission checklist
- Mark guards and identify the first likely sight line.
- Choose cover and darkness before moving into an exposed area.
- Separate the rank attempt from collectible or optional-objective detours unless they are required.
- Use nonviolent takedowns when practical in The Phantom Pain.
- Keep Reflex Shot as an emergency response in Ground Zeroes, not as a planned method of entering a base.
- Track where time is lost and change one route variable per replay.
- Restart only when an alert, combat sequence, or delay has made the target result unrealistic.
The practical ranking loop is therefore: scout, bypass, move quickly, recover decisively if necessary, and replay with a specific improvement. Staying undetected protects the result; speed turns a safe route into a competitive one; and avoiding needless force prevents a clean objective from becoming a poor-ranked mission.
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