Ancient Ones
16 Ancient Ones with at least 5 community-logged games. Click any name for a per-AO dossier.
Difficulty
Difficulty ranking
Loss rate per Ancient One with 95% Wilson confidence intervals. Higher loss rate = harder.
Most-encountered Ancient Ones
Share of community-logged games that featured each Ancient One. The top 16 by popularity.
Ancient One play concentration
How dominant are the top Ancient Ones? Cumulative share of all community-logged games as you walk the AOs from most-played to least-played.
Where the Doom track lands
Distribution of final doom-track values per Ancient One. Bimodal shapes reveal swingy AOs — some games creep to the brink and win on the last turn while others collapse early.
The Blood Price of Victory
Win rate vs. casualties per investigator
A 50% win rate against Cthulhu feels different from a 50% win rate against Yig if one of them leaves the table littered with corpses. X = win rate. Y = average investigators defeated or devoured per team member. Bottom-right = clean wins. Top-left = wipes.
Epic Monsters
The Epic Monster Threat Atlas
Each bubble is an Epic Monster. X = win-rate lift (how much more or less likely a team is to win when this monster appears). Y = casualty lift (how many extra investigators it tends to defeat). Size = total encounters. Green bubbles right-of-center = monsters that signal an easier game. Red bubbles top-left = the genuine killers.
Ancient One monster fingerprints
For each Ancient One × Epic Monster cell: how much more often does this monster appear in this AO's games vs. globally? Cells with lift > 5× are this AO's signature monsters. The Abhoth + Child of Abhoth combo lands at 15.7×.
Pacing
Minutes to Madness
Plan your game night. X = win rate, Y = average session length in minutes. Top-left = brutal grinds. Bottom-right = quick wins. Size = total games. Hover for minutes-per-player so you can compare AOs across team sizes.
Team-size sweet spots
Team-size sweet spot per Ancient One (heatmap)
Win rate by AO × team-size. The darker the cell, the further from the community baseline. Rows ordered by overall difficulty (hardest AO at the top). Cells with fewer than 5 games are dimmed.
Preludes against each AO
Most-used preludes
Frequency of the top 15 preludes among games that use one. The base game (no prelude) is omitted from the chart to keep the comparison meaningful — about 52.5% of games skip the prelude.
Prelude impact (stratified)
Difference in win rate for each prelude vs not having one, controlling for AO and expansion set. Bootstrap 95% CIs. Bars that cross zero can't be distinguished from random variation.
Prelude × Ancient One signature heatmap
Δ win rate (with prelude − without prelude), per (prelude, AO). Brass-green cells = this prelude helps this AO; coffee-stamp red cells = it hurts. Cells with fewer than 3 games on either side are blank.
The full roster
All Ancient Ones
Sorted hardest to easiest. Frequency is share of all games where this AO appeared.
| Ancient One | Games | Loss rate | Frequency |
|---|---|---|---|
| Cthulhu | 2,115 | 55.7% [54%, 58%] | 10.0% |
| Yig | 1,655 | 51.6% [49%, 54%] | 7.8% |
| Azathoth | 3,252 | 46.1% [44%, 48%] | 15.4% |
| Shub-Niggurath | 2,221 | 44.1% [42%, 46%] | 10.5% |
| Syzygy | 1,152 | 41.6% [39%, 44%] | 5.5% |
| Shudde M'ell | 824 | 39.7% [36%, 43%] | 3.9% |
| Hastur | 926 | 37.5% [34%, 41%] | 4.4% |
| Atlach-Nacha | 655 | 37.4% [34%, 41%] | 3.1% |
| Yog-Sothoth | 2,367 | 36.6% [35%, 39%] | 11.2% |
| Nyarlathotep | 526 | 36.3% [32%, 41%] | 2.5% |
| Ithaqua | 1,091 | 31.4% [29%, 34%] | 5.2% |
| Nephren-Ka | 1,019 | 29.6% [27%, 33%] | 4.8% |
| Hypnos | 743 | 26.7% [24%, 30%] | 3.5% |
| Abhoth | 960 | 25.2% [23%, 28%] | 4.5% |
| Rise of the Elder Things | 1,114 | 24.2% [22%, 27%] | 5.3% |
| Antediluvium | 512 | 23.8% [20%, 28%] | 2.4% |