专家级龙与地下城第二版

Advanced Dungeons & Dragons 2nd edition

In 1987, a small team of designers began work on the second edition of the AD&D game, beginning the most massive coordinated task ever undertaken by TSR to date, which would take nearly two years to complete. In 1989, Advanced Dungeons & Dragons 2nd Edition was published, featuring new rules and characters. By the end of its first decade, AD&D had expanded to several rulebooks, including three Monster Manuals, and two books governing character skills in wilderness and underground settings. Initially, the 2nd edition would consolidate the game, with three essential books to govern Dungeon Masters and players alike. Periodically, TSR published optional rulebooks for character classes and races to enhance game play. The combat system was changed. The minimum number required to hit a target uses a mathematical formula in which the defender's Armor Class (AC) is subtracted from the attacker's THAC0 (To Hit Armor Class "0") instead of 1st edition's attack matrix tables. Distances are based on in-game units (feet) rather than miniatures-board ones (inches). Demi-human races are given higher level maximums to increase their long-term playability, though they are still restricted in terms of character class flexibility. Critical hits are offered as optional rules.