This is probably one of the hardest achievements because it requires certain conditions to be met. So I've included the 5th route "S-Rank Route", which is intended for doing S-Rank and also allows you to play all support characters in a single playthrough. Yeah, it is possible.
In order to get S-Rank, you must play on "Normal Mode" or above and have at least 54 points. The point is calculated as follows:
Time
| Time completed the game | Points |
|---|---|
| Less than 5 hours | 10 |
| 5 to 7 hours | 7 |
| 7 to 9 hours | 5 |
| above 9 hours | 3 |
Souls
| Souls Absorbed | Points |
|---|---|
| 120,000 or more | 10 |
| 80,000 to 120,000 | 7 |
| 40,000 to 80,000 | 5 |
| Less than 40,000 | 3 |
Kills
| Demon Killed | Points |
|---|---|
| 900 or more | 10 |
| 600 to 899 | 7 |
| 300 to 599 | 5 |
| Less than 300 | 3 |
Critical Hits
Any critical hits will count, including normal critical hit, defend critical hit, chain-critical hit, critical using Black Necklace.
| Number of Critical Hits | Points |
|---|---|
| 450 or more | 10 |
| 300 to 449 | 7 |
| 150 to 299 | 5 |
| Less than 150 | 3 |
Phantom Realms
| Number of Floor Completed | Points |
|---|---|
| All 41 floors | 10 |
| 30 to 40 floors | 7 |
| 20 to 29 floors | 5 |
| Less than 20 floors | 3 |
Scenarios
There are a total of 100 scenarios, which means that each scenario you triggered gives you 1%.
| Scenarios | Points |
|---|---|
| 65% or more | 10 |
| 60% to 64% | 7 |
| 55% to 59% | 5 |
| Less than 54% | 3 |
Here is the ranking by points:
| Points | Rank |
|---|---|
| 54 points or more | S |
| 45 to 53 points | A |
| 35 to 44 points | B |
| 20 to 34 points | C |
| Less than 20 points | D |
As you can see that you have to hit
- 10 points in 5 categories, and at least 5 points for the 6th.
- or 10 points in 4 categories, and 7 points in the last two categories.
That's why it is important to do the "S-Rank Route" last so that you are familiar with the game. The "S-Rank Route" will help you achieve 10 points in "Phantom Realms" and "Scenarios" categories. However, it's up to you to complete the other 4 by yourself.
- Time: this might be a problem since unlocking more scenarios means that you spend more time playing as support characters. I would say getting 7 points is easier in this category.
- Souls: shouldn't be a problem as long as you kill a good number of demons for souls. Easily 10 points.
- Kills: this category is also easily 10 points.
- Critical HIts: this can be troublesome if you are bad at performing critical hit. I believe practice more will help you achieve this.
Tip: play in "Normal Mode" will help a lot because the critical hit frame is longer than "Hard Mode", also after you get the "Black Necklace" equip it immediately and use it to kill as many as possible.
Note: If you do not get 10 points for "Kills" or "Critical Hits" categories, you can reload the game from the Magic Mirror in the Demon Base, then get in and out of the Purple Phantom Realm (1st floor) to kill more demons until you reach the numbers. Unfortunately, you cannot use "Black Necklace" in the Phantom Realm, so it heavily relies on your skill to perform critical hits.