Converts all ability checks, skill checks, saving throws, and attack/grapple rolls to a unified Target 20 system. Every roll is standardized to “roll high vs. 20” while preserving mathematically identical success/failure rates to stock rules.

Core Concept

Instead of rolling against varying DCs or ACs, the extension folds the natural target number into your modifier:

delta = 20 - naturalTarget
nMod = nMod + delta
target = 20

• A DC 16 Reflex save becomes “roll +4, vs 20”
• An attack vs. AC 18 becomes “roll +2, vs 20”
• The outcome is identical to stock rules, but every d20 roll in the game now feels consistent and familiar.

Detailed Mechanics

• Saves: Full character level bonus added (PC only). Chat shows [DC X - T20 +Y] [+Z LEVEL].
• Ability & Skill Checks: floor(level/2) bonus (PC only). Chat shows [+Z LEVEL/2].
• Attacks & Grapple (PFRPG CMD): Delta applied using target AC/CMD. No level bonus (non-combat bonus only). Chat shows [AC X - T20 +Y].
• Natural 1s and 20s (auto-miss/threat) remain unchanged.
• Critical confirmation rolls automatically inherit the adjusted modifiers and target.

Why Target 20?

• Creates a consistent “roll high vs 20” feel across the entire game.
• Greatly simplifies mental math during play, especially for newer players or large tables.
• Keeps all the original balance and scaling intact through smart delta/level adjustments.

How It Works

• Checks/Saves: Hooks into the universal onActionPreModRoll system (same family used by Extended Automation and 35e-advdis).
• Attacks: Intelligently wraps ActorManager35E.getDefenseValue to adjust modifiers and defense values on the fly without breaking any existing attack logic.

Compatibility

• Official 3.5E and PFRPG rulesets.
• Purely additive — no core files are modified.
• Works independently of PFRPG - Extended Automation and 35e-advdis.
• Grapple in 3.5E (opposed check) is not auto-adjusted; PFRPG CMD works fully.

Streamline your classic d20 gameplay with one simple, powerful change. Perfect companion to 35e-advdis for a modern-feeling 3.5E / Pathfinder 1E experience!