The Player's Companion is the first expansion for the Adventurer Conqueror King System (ACKS) and an invaluable resource for players and Judges of the original fantasy role-playing game and its retro-clones. With this book you can do the following: Expand your campaigns with 19 new character classes, including the anti-paladin, barbarian, dwarven delver, dwarven fury, dwarven machinist, elven courtier, elven enchanter, elven ranger, gnomish trickster, mystic, Nobiran wonderworker, paladin, priestess, shaman, Thrassian gladiator, venturer, warlock, witch, and Zaharan ruinguard. Quickly create vivid characters using 248 templates featuring pre-selected profiencies, spells, and equipment options. Eight archetypes are presented for every class in the ACKS core rules and the Player's Companion; customize your barbarian to be a Berserker or a Sea Rover, or let the dice choose! Make your own character classes using a balanced point-based system 100% compatible with every class in the ACKS core rules and the Player's Companion. Achieve your own perfect blend of fighting, thievery, divine grace, and magical power! Bring wonder to your game world with a dynamic spell system. Invent your own new spells during play with advanced magic research rules that allow your characters to experiment, make breakthroughs, and suffer side effects. Comprehensive guidelines let Judges determine what level a proposed spell will be and gauge its balance with all existing spells. Expand the options available to new characters as well as old with new equipment and proficiencies. The Player's Companion allows you to customize your fantasy game to an unparalleled degree. Open up the hood of the Adventurer Conqueror King System and gain new insights into the foundations of the original fantasy RPG!