2E Attack Throw is a comprehensive extension for the official AD&D 2nd Edition ruleset in Fantasy Grounds Unity that replaces the traditional THAC0 / to-hit matrices with the clean, modern Attack Throw system from ACKS II (Adventurer Conqueror King System II).

It brings the elegant "N+" Attack Throw mechanic (and its supporting tables) into your 2E games while preserving full compatibility with existing modules, items, and character data.

How Attack Throw Works

1. Look up the attacker's Attack Throw (the N in N+) based on class level or NPC Hit Dice.
2. Roll 1d20 + modifiers (STR/DEX, weapon, effects, etc.).
3. Success if total ≥ Attack Throw + target AC (using ACKS ascending AC where unarmored = 0).
4. Natural 1 always misses; natural 20 always hits.

Example: A 10th-level fighter has a 4+ Attack Throw.

• Unarmored target (AC 0) → needs 4+
• Plate-armored target (AC 6) → needs 10+

Key Features

• Character Sheet: Combat tab shows Throw (the N value) instead of THAC0. AC displays as ACKS ascending (higher = better).
• NPCs / Combat Tracker: Throw field derived from Hit Dice (ACKS Monster HD table). Manual override supported.
• Attack Rolls: Chat output clearly shows [ATKTHROW(10+) vs AC 2 need 12+].
• Combat Matrix: Full replacement of the stock THAC0 matrix with ACKS-style columns (AC 0–12). Base line shows your Attack Throw as N+.
• AC Conversion: Inventory and modules continue using classic 2E descending AC under the hood (ACKS_AC = 10 - 2E_AC). No data migration needed.
• Class & NPC Support: Proper 2E grouping (Warrior / Priest / Rogue / Wizard) mapped to ACKS II Fighter, Crusader/Thief, and Mage progressions. Multiclass uses the best (lowest) throw.

Compatibility & Composition

• Works with official 2E ruleset.
• Plays well with 2e-thematicsaves, 2e-advdis, 2e-target20, 2e-skillthrow, and similar extensions.
• No core ruleset files are overwritten — uses standard extension patterns.
• Exposes AttackThrowManager.isActive() for other extensions.
• Psionics (MTHACO) left untouched.

Lightweight, reversible, and developer-friendly with included scripts for deployment, backup, sync, and building the .ext package.