Friday, May 15, 2026

Changes to OSRIC 3.0 from AD&D


Changes to OSRIC 3.0 from AD&D

A list of changes from OSRIC 2.0 to 3.0 can also be found here:


My list based on potential at-the-table differences:

OSRIC 3 noted as O3

Ability Scores

  1. Intelligent has no reference to minimum spells known.

Classes and Equipment

  1. Fighters are presented (optionally) with the UA optional rule of Specialization.
  2. Experience tables differ slightly. (ex. A fighter only needs 17,000 XP to get to level 5 instead of 18,001)
  3. Classes gain weapon proficiencies in O3 at a rate different than AD&D. (For example, clerics get their 3rd at level 5 in AD&D, 4 in O3).
  4. Differences in ability score headers (minor and major tests of strength).
  5. Elves, Gnomes and Dwarves could only be NPC clerics in AD&D, but now can be PCs. 
  6. Half-orcs are capped at level 15 for assassin and level 7 for thieves.
  7. Assassins get -3 non-proficiency with weapons instead of -2.
  8. Assassination percentiles are formulaically much higher than the AD&D chart.
  9. No psionics or bard classes.
  10. Certain details of the weapons table (ex. crossbows do more damage and "pole arm").
  11. Details of the thief's skills progression are different.
  12. No weapons vs. ac type.
  13. No weapon speed factor.

Combat

  1. Charging is stated to happen after the charge terminates on initiative roll in O3. In AD&D, initiative it not checked at the melee at the end of a change.
  2. Damage in O3 taken by an unconscious character aside from bleeding is instantly killed.


Spells

  1. Some spells have been renamed.
  2. OSRIC specifically allows spells learned to be 'dropped' to learn a different spell.
  3. The Fly spell in the AD&D is 1 Turn/level + 1-6 turns. O3 is 6 Turns/MU Level + 1d6 Turns.
  4. Wall of Ice in O3 is definitely 10 feet thick, rather than AD&Ds common interpretation of non-map unit inches.


Monsters and Magic Items

  1. Some creatures and items have been renamed or removed ( ex. No Mind Flayer or Eye of Vecna).
  2. O3 does not list item XP values.

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Changes to OSRIC 3.0 from AD&D

Changes to OSRIC 3.0 from AD&D A list of changes from OSRIC 2.0 to 3.0 can also be found here: https://garysentus.blogspot.com/2026/04/o...