Our Rating System

Every series that comes through here faces its tribulation. Amazon hands out 4.7 stars to anything that shows up; the heavens send lightning. The tiers below are what survived, and where they landed when the smoke cleared.

Why tiers instead of stars

Star ratings break in a specific way for genre fiction. Amazon's averages cluster between 4.2 and 4.8. That range is supposed to span "okay" through "all-time genre flagship", and it doesn't. A novel that quietly delivers on every promise the genre makes and a novel that redefined what the genre could promise both land at 4.5 stars in the consensus, and a reader trying to choose between them learns nothing.

Worth the Credit uses a cultivation-tier system for series ratings instead. The names are borrowed from progression-fantasy's own vocabulary because the audience is fluent in them: tiers communicate categories of quality rather than fractional decimals. An A-mid series is a better recommendation than a 4.5-star average can be, because A-mid describes the kind of book it is rather than a number that compresses everything into 0.3 stars of meaningful difference.

The tier shown anywhere on this site is clickable. Land cold from a search result, see a tier you don't recognize yet, click through to this page — the rating explains itself.

The series tier scale

Twenty tiers, ordered from Mythic at the apex through F at the bottom. S, A, B, and C each split into four bands (peak → high → mid → low); Mythic, D, E, and F are single tiers used sparingly, Mythic most sparingly of all.

Mythic — the tier the book had to invent

Reserved for a series so far above the rest of the genre that calling it S-tier would understate it. You don't grade into Mythic; the book has to invent the tier. Membership is exactly one.

• Mythic — Dungeon Crawler Carl (Matt Dinniman, narrated by Jeff Hays / Soundbooth Theater). The only series on Worth the Credit that sits above S, and the only series I believe ever will. The bar is did this series exceed what S was built to describe. Not a numeric score — Mythic is a category, not a measurement.

A series doesn't get a path into Mythic the way it has a path from B-peak to A-low. Mythic exists because Dungeon Crawler Carl forced the structural exception; if a second series ever earns it, the case will be made in writing on the series's review page rather than slid in by inference.

S — genre-defining

Reserved for the very top of the genre below Mythic. A series earns the S tier not by being excellent (several series are excellent) but by changing what readers expect from the genre, or by clearing a craft bar that puts it in conversation with the series that did. Four bands:

• S-peak — the foundational classics. Cradle and He Who Fights with Monsters: not because they're the highest-rated on Amazon (they aren't always), but because the genre as a whole reset around what they proved was possible. The bar is did this series change the shape of LitRPG.
• S-high — series that clearly belong in the S conversation but haven't (or haven't yet) bent the genre around themselves. The craft is at the flagship level; the cultural impact may catch up later, or may not. Examples: The Primal Hunter, Defiance of the Fall, The Licanius Trilogy.
• S-mid — solidly S-tier. The series operates at a level that puts every component (character, system, prose, audio production) in the upper percentile of the genre, even if no single component is doing something the foundational classics didn't do first. Examples: Infinite Realm: Monsters and Legends, Beware of Chicken.
• S-low — entry-level S. The series is good enough that demoting it to A-peak would understate it, but the case for S over A is the trajectory and the ambition rather than a finished argument. Examples: Warformed: Stormweaver (held at S-low by two specific craft decisions and a release cadence that keeps readers waiting), All the Skills, Last Life.

A series can be five-star excellent across every metric and not earn S. The wall between A-peak and S-low is a true bottleneck, the way cultivation stories mean it: most series meditate at that wall forever, and that is exactly how it should be. S is for the genre flagships and their close peers, and the breakthrough is deliberately rare so the tier means something.

A-tier — exceptional

The category for series that are clearly in the upper-quartile of the genre but haven't (yet) redefined the form. Four bands: the high subdivision exists so we can distinguish outstanding A-tier work that's pushing on the S boundary from outstanding A-tier work that simply sits at the top of the band:

• A-peak — exceptional, almost S. The series sits one major breakthrough away from genre-defining status. Example: Battle Mage Farmer.
• A-high — outstanding A-tier work that doesn't quite earn the "almost S" framing. The series is uncontested as upper-A, but the path to S isn't visible yet. Example: The Path of Ascension.
• A-mid — excellent. Must-listen for anyone who likes the genre. Examples: Mark of the Fool, Welcome to the Multiverse.
• A-low — very good. A clear recommendation, with honest caveats. Examples: Dawn of the Density God (upgraded from a provisional B-peak once I was current through Book 5), Overlord.

The internal differences across A-peak / A-high / A-mid / A-low are real but narrow. A reader who likes one A-tier series is statistically likely to enjoy others in the same band.

B-tier — solid

The category for series that earn their recommendations but ask something of the reader: patience with rough early books, tolerance for a specific niche, willingness to push past flaws. A B-tier series stays enjoyable through everything published so far. If we stopped reading it, it belongs in C. Four bands:

• B-peak — approaching A territory. The series is good and would be A-tier without one or two specific issues. (No series currently sits at this exact band on the site.)
• B-high — strong B-tier that doesn't quite cross into A. The reader gets a consistent payoff without the issues being completely absent. (No series currently sits at this exact band on the site.)
• B-mid — enjoyable, reliably good. The reader who wants what the series offers will be glad they tried it. Example: Terminate the Other World!.
• B-low — worth it for the right reader. Often a niche pick; the recommendation comes with specific reader-fit guidance. Example: Portal to Nova Roma.

The B-tier is where most working LitRPG series land, and that's appropriate. Most books in any genre are good, not exceptional.

C-tier — mixed

The category for series with real problems, where the recommendation is conditional. We don't avoid C-tier ratings; a C-tier with specific caveats is more useful editorial than a soft B-tier that pretends the issues aren't there.

One structural rule governs the band: any series we stopped reading caps at C. A B-tier verdict promises the series stays enjoyable through what exists, and a series we quit buying is by definition one where that stopped being true. The sub-band records how good the run was before the stop. Disgardium earned eleven strong books before its bail and sits at C-peak, while a series that never justified its premise sits at C-low. The stop point itself lives in each review's closing note, and for a series that fell off, that "read through Book X" guidance is the verdict that matters most. Two boundary cases sit outside the rule: being current on an ongoing series is not a stop, and a series abandoned over outright quality collapse can fall below C on its own demerits.

Four bands:

• C-peak — decent, with notable caveats. The series has real strengths, but the flaws are persistent enough that not every reader will get past them. Example: Disgardium (eleven strong books before the arc that ended the run).
• C-high — the strengths offset the flaws enough for a qualified recommendation, but the caveats still apply and the reader needs to come in with eyes open. Examples: Rise of the Cheat Potion Maker, Reincarnation of the Death God.
• C-mid — mixed. Situational. Borrow on Kindle Unlimited before spending a credit. Examples: Dungeon Lord, The Ten Realms.
• C-low — hard to recommend broadly. Specific readers will find specific value; most won't. Examples: Starbreaker, Legend of the Dark Heart (stopped at 75% — strong opening that ran out of steam in Book 1).

C-tier ratings often come with the strongest editorial framing on the site, because why a series sits in this tier matters more than the number.

D / E / F — rarely used

These tiers exist for outright bad work: series that fail at the craft level, AI-generated shovelware, or material so flawed that no reader will benefit from it. We use them sparingly. Most weak LitRPG belongs in C-tier with honest caveats; D-and-below is reserved for the rare case where there's nothing salvageable to recommend.

When a D, E, or F appears on this site, it will be accompanied by a specific argument for why the rating goes that low rather than parking at C-low.

Ratings on ongoing series

Every tier shown on this site reflects two things simultaneously: the quality of the series as it currently stands, and the point in the series I have personally reached. Both matter, and both can change.

The reading position matters. A rating on an ongoing series is based on how much of it has been listened to. If I'm through Book 6 of a twelve-book series, the rating reflects Books 1–6 — not a verdict on the whole. This is stated explicitly in reviews where the position meaningfully affects the interpretation (for example, a series where the arc is widely understood to shift in Book 8). Where a review doesn't specify otherwise, assume I was at the current publication point when the rating was assigned.

Ongoing series can rise or fall. A series in active publication can change. A run of exceptional books might push an A-high into S conversation. A widely anticipated entry that disappoints — the kind of book that arrives with expectation and then fails to deliver on it — can drag a tier down. The example on this site: Unbound by Nicoli Gonnella, which appears on the Series That Lost Their Way list specifically because the series was tracking toward a high tier before a book arrived that reset the conversation. Where a rating changes substantially after a new release, the review page will explain why.

Completed series hold their rating. Once a series is fully published and I've finished it, the tier is a permanent verdict on the complete work — including whether it sticks the landing. A series that ends badly may receive a retroactive downgrade; a series that builds to a conclusion better than its middle gets the same treatment in reverse. The final judgment on completed work is more authoritative than a mid-series position.

When in doubt: check the review for the series' publication date and the listening position. The tier is an honest opinion at a specific point in time, not a promise about what the next book will do.

Release cadence

Every ongoing series carries a release cadence grade. It answers one question: if you start this series today, how long will you wait for the next audiobook?

It grades the release schedule, not the author. The dates come from audiobook releases, and for a series whose narrator is in heavy demand the audio can trail a finished manuscript by months. Travis Baldree narrates eight series covered on this site, so some of what this number measures is his recording queue rather than anyone's writing speed. That is the honest thing to measure for an audiobook site, because the audio release is the thing you are actually waiting for, but it should not be read as a verdict on how fast someone writes.

Typical gap between audiobooks	Grade
6 months or less	5.0
7 to 9 months	4.5
10 to 12 months	4.0
13 to 18 months	3.5
19 to 24 months	3.0
25 months or more	2.5
Abandoned	1.0

Completed series carry no cadence grade. The question the grade answers is how long you will wait for the next book, and once a series is finished there is nothing to wait for. A complete series gets a dash here, which is a better outcome than any score.

A book a year sits at 4.0 and is a perfectly good cadence. Releases measured in months rather than years are the exception and grade above it. The fastest cadences in the genre usually belong to series that were serialized on Royal Road before a publisher picked them up, so a large backlog was already written.

The grade is derived from the bands above rather than assigned by feel, and prose-lint fails the build if a review's grade does not match its stated cadence. That rule exists because it drifted badly before it was written down: the twelve-month cohort alone had grades ranging from 3.0 to 4.5.

Narrator ratings — stars, not tiers

Audiobook narrators use a 1-to-5 star scale, with half-star increments. Separate system, different scale, deliberate choice.

The reason: narrator quality doesn't follow the same distribution as series quality. A narrator who does excellent work on every book deserves an excellent rating on every book, even if their work isn't redefining what audiobook narration can do, and a category called "genre-defining" makes less sense applied to performance than it does applied to authorship.

Three different questions, three different numbers

This tripped me up for a while, so it is worth being explicit. There are three narrator numbers on this site and they answer different things.

Where	What it answers
narratorGrade, on a review	How good is this performance, on this book?
Overall grade, on a narrator profile	How good is this narrator across their body of work?
Comparative rank, on a narrator profile	Where do they sit against everyone else in the genre?

The review grade is the one people misread. It is not a verdict on the narrator. Peter Kenny narrates The Witcher and twenty-three Iain M. Banks novels, and his work on Voidborne gets a 2.5, because the grade is measuring the recording in front of me rather than the reputation behind it. The same cuts the other way: a great narrator having an off day does not inherit a 5 from their back catalog.

That split is what keeps the comparative question out of the review. Jeff Hays is ranked first in the genre on this site, and that is settled on his profile, not re-argued every time he narrates something.

What the review grade means

Grade	The performance
5	Is itself a reason to choose audio over print. It does something the page cannot.
4	Excellent and invisible. Characters stay distinct, nothing pulls you out of the book.
3	Competent. Clear, correct, unremarkable. Neither helps nor hurts.
2	A chore. Listenable, but the performance is working against your enjoyment.
1	Defeats the book. You lose words, rewind, or quit because of the audio.

Half-steps allowed, and used often.

The bar for a 5 is deliberately high, because a scale where every competent narrator scores 4.5 or better is no scale at all. That is precisely the failure this site complains about in The Amazon 4-Star Lie: the whole genre compressed into four tenths of a star, telling you nothing. A narrator grade that only ever ranges from 4 to 5 would be the same broken instrument.

So a 5 has to earn itself on the specific book. A narrator with limited vocal range who nonetheless carries a series cleanly is a 4 or 4.5, and that is a compliment, not a knock.