The second edition of D&D began in 1987 by a small groupe of designers which took them 2 years to complete. 1989.The advanced version was featuring new rules and characters. the first decade the game had passed several rule books, monster manuals and two books of character skills. The 2nd edition made three books to govern DMs and players alike.
The combat was changed again to use a mathimatical formula in which the defenders "AC" Armor class is subtracted from the attackers.
The release of the AD&D 2nd edition ( advanced Dungeons & Dragons) made important policy changes, that recived negative publicity because they remouved all mention of Demons and Devils, althought more monsters were added to replace the ones thst were taken out. Moving away from the ambiguity of the first edition they eliminated character classes and races like Assassin and Half-orc. The target age was also lowered to be more appeling to teenagers
