Adventurer Conqueror King System
A comprehensive OSR system that spans the complete hero's journey from dungeon delver to domain ruler. Features detailed economic simulation, stronghold construction, and mass combat rules that let characters grow from adventurers to conquerors to kings.
OSR lineage • B/X foundation • 12 classes • Domain management • Economic simulation • Mass combat
Adventurer Conqueror King System (ACKS) presents a world of fallen empires and rising kingdoms, where ancient ruins hold treasures that can fund armies and build dynasties. The default setting assumes a swords-and-sorcery environment with decaying civilizations, borderland threats, and opportunities for ambitious adventurers to carve out their own domains.
Theme and Setting
The game embraces the mercenary spirit of early fantasy RPGs while providing the mechanical framework to support campaigns that extend far beyond dungeon crawling into realm management and epic warfare. ACKS builds on the B/X D&D foundation with ascending AC and an Attack Throw system: roll 1d20 plus modifiers to meet or exceed a target number based on class and level.
How Play Feels
The game offers 12 distinct classes divided into four categories: Core Classes (Fighter, Mage, Cleric, Thief), Campaign Classes (Assassin, Bard, Bladedancer, Explorer), and Demi-Human Classes (Dwarven Vaultguard, Dwarven Craftpriest, Elven Spellsword, Elven Nightblade). Proficiencies provide skill-like customization without adding excessive complexity.
What Makes It Distinct
The spell system preserves traditional Vancian magic while adding ritual magic for longer casting times. ACKS distinguishes itself through its comprehensive domain and economic systems.
Where It May Not Fit
You mainly want short standalone sessions with minimal carryover You want the system to stay almost invisible at the table.