Dangerous Journeys had between 18 and 27, depending on how you looked at it, arranged in a hierarchical system.On the other end, you have Diane Warrior Princess with 11. It’s attribute-based, having only attributes and no skills or classes. Has there been a game with more?
At the top of the system you had three stats: Physical, Mental, and Spiritual.
Next step down, you had two stats under each of these. Physical Muscular, Physical Neural, Mental Mnemonic, Mental Reasoning, Spiritual Metaphysical, and Spiritual Psychic.
And at the bottom of the hierarchy, you had (under each of the six) Power, Speed, and Cap. Cap wasn't used much on its own once the PC was in play, but acted as a ceiling for how high you could increase the others.
When making your character, you rolled for the 18 bottom-level stats. These were then summed upwards, so Physical Muscular was equal to PMPow+PMSpd+PMCap, and Physical was equal to Muscle+Neural.