Monsters are an important element of Advanced Dungeons & Dragons 2nd edition, a role-playing game. The ones listed here are only those from official Advanced Dungeons & Dragons 2nd Edition supplements published by TSR, Inc. or Wizards of the Coast, not licensed or unlicensed third-party products such as video games or unlicensed Advanced Dungeons & Dragons 2nd Edition manuals.

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Monsters in the 2nd edition Advanced Dungeons & Dragons The second edition of the Advanced Dungeons & Dragons game features both a higher number of books of monsters—"many tied to their growing stable of campaign worlds"—and more extensive monster descriptions than both earlier and later editions, with usually one page in length. Next to a description, monster entries in this edition contained standardized sections covering combat, their habit and society, and their role in the eco-system. While later editions gave the various creatures all the attributes which player characters had, 2nd edition only listed intelligence, a characteristic important for creating challenging encounters in the game.

The 2nd edition also uses a unique format in the form of Monstrous Compendiums of loose sheets that could be collected in a folder, allowing for a combination of monster books together with individual monster pages from boxed sets. This "unruly" format was abandoned again in 1993 in favor of bound books. In parallel with this change, the 2nd edition introduced colored images for each monster, which became standard in later editions of the game. Referencing Wizards of the Coast art director Dawn Murin, GameSpy author Allan Rausch found that until the 2nd edition the artwork depicting monsters was influenced by the popular culture of the late 1970s. As a result, creatures that were fearsome by description were not taken seriously due to ill-suited visuals. Likewise, humanoid monsters too closely resembled humans to be compelling. In the view of Rausch as well as Backstab reviewer Michaël Croitoriu, the Planescape setting marked a turning point for these shortcomings, which also had a significant impact on the presentation of the 3rd edition.

The second edition's monsters were based on original inventions, fantasy literature, and mythologies from various cultures. Many monsters were updated from earlier editions, but the 2nd edition also introduced a great number of new creatures.

Some types, such as devils and demons, were initially removed by TSR in response to a moral panic promoted by Patricia Pulling's advocacy group Bothered About Dungeons and Dragons (BADD). These were later reintroduced, sometimes with different names to avoid complaints.

TSR 2102 – MC1 – Monstrous Compendium Volume One (1989) This was the initial volume in the Monstrous Compendium series, for the second edition of the Advanced Dungeons & Dragons game, published in 1989. Most of the monsters for Volume One were taken from previous first edition AD&D books; the monster entries were greatly expanded and in most cases each monster now filled an entire page and had an all-new illustration. The Monstrous Compendium series consisted of a pack of 5-hole-punched loose-leaf pages rather than an actual book, designed to be arranged to the player's preference. Volume One of the Monstrous Compendium was packaged in a box, which contained the pack of monster sheets as well as a binder intended to store the sheets for Volumes One, Two, and Three. The pack consisted of 144 pages, unnumbered, and included a "How To Use This Book" page, with an alphabetical index to Volume One on the back, four pages of monster summoning and random encounter charts, and a blank monster sheet to be photocopied, with the remainder consisting of the monster descriptions. Also included were eight full-page illustrations on heavier card stock. Note: All monsters from MC1 appeared in the Monstrous Manual (1993), though some had slightly altered headings. + TSR 2102 – MC1 – Monstrous Compendium Volume One (1989) – Creature Other appearances Variants Description

TSR 2103 – MC2 – Monstrous Compendium Volume Two (1989) This was the second volume in the Monstrous Compendium series, for the second edition of Advanced Dungeons & Dragons, published in 1989. As with Volume One, most of the monsters for Volume Two were taken from previous first edition AD&D books, with greatly expanded entries that now filled an entire page and had an all-new illustration. Volume Two was packaged in a wraparound cover, and the pages were designed to fit in the binder that came with Volume One of the Monstrous Compendium. The pack consisted of 144 pages, unnumbered, and included a 2-page alphabetical index to Volume One and Volume Two, 10 pages of monster summoning and random encounter charts, and a blank monster sheet to be photocopied with a sheet of instructions for the blank monster form, with the remainder consisting of the monster descriptions. Also included were 8 full-page illustrations on heavier card stock. Note: All monsters from MC2 appeared in the Monstrous Manual (1993), though some had slightly altered headings. + TSR 2103 – MC2 – Monstrous Compendium Volume Two (1989) – Creature Other appearances Variants Description

TSR 2104 – MC3 – Monstrous Compendium – Forgotten Realms Appendix (1989) This appendix to the Monstrous Compendium series was designed for use with the Forgotten Realms campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 64 5-hole-punched unnumbered loose-leaf pages. + TSR 2104 – MC3 – Monstrous Compendium – Forgotten Realms Appendix (1989) – Creature Other appearances Variants Description

TSR 2105 – MC4 – Monstrous Compendium – Dragonlance Appendix (1990) This appendix to the Monstrous Compendium series was designed for use with the Dragonlance campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 96 5-hole-punched loose-leaf pages, unnumbered, and included a "How To Use This Book" page, a page with alphabetical index, 4 pages of random encounter charts, and 2 pages with the compiled game statistics, with the remainder consisting of the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. + TSR 2105 – MC4 – Monstrous Compendium – Dragonlance Appendix (1990) – Creature Other appearances Variants Description

TSR 2107 – MC5 – Monstrous Compendium – Greyhawk Appendix (1990) This appendix to the Monstrous Compendium series was designed for use with the Greyhawk campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 64 5-hole-punched loose-leaf pages, unnumbered, and included a "How To Use This Book" page with an alphabetical index, 4 pages of random encounter charts, with the remainder consisting of the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. + TSR 2107 – MC5 – Monstrous Compendium – Greyhawk Appendix (1990) – Creature Other appearances Variants Description

TSR 2116 – MC6 – Monstrous Compendium – Kara-Tur Appendix (1990) This appendix to the Monstrous Compendium series was designed for use with the Oriental Adventures campaign setting called Kara-Tur for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 64 5-hole-punched loose-leaf pages, unnumbered, and included a "How To Use This Book" page with an alphabetical index and 4 pages of random encounter charts, with the remainder consisting of the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. + TSR 2116 – MC6 – Monstrous Compendium – Kara-Tur Appendix (1990) – Creature Other appearances Variants Description

TSR 2109 – MC7 – Monstrous Compendium – Spelljammer Appendix (1990) This appendix to the Monstrous Compendium series was designed for use with the Spelljammer campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 64 5-hole-punched loose-leaf pages, unnumbered, providing the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. + TSR 2109 – MC7 – Monstrous Compendium – Spelljammer Appendix (1990) – Creature Other appearances Variants Description

TSR 2118 – MC8 – Monstrous Compendium – Outer Planes Appendix (1991) This appendix to the Monstrous Compendium series for the second edition of the Advanced Dungeons & Dragons game added additional creatures from the Outer Planes. The pack consisted of 96 double-sided, 5-hole-punched loose-leaf pages, unnumbered, providing the descriptions of the fictional monsters, as well as a 2-page "How to use this book" section, and a 4-page section providing background information on the Outer Planes. + TSR 2118 – MC8 – Monstrous Compendium – Outer Planes Appendix (1991) – Creature Other appearances Variants Description

TSR 2119 – MC9 – Monstrous Compendium – Spelljammer Appendix (1991) This appendix to the Monstrous Compendium series was designed for use with the Spelljammer campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 64 5-hole-punched loose-leaf pages, unnumbered, providing the descriptions of the fictional monsters, and a single-page index of the creatures in the Spelljammer campaign setting (including sources). + TSR 2119 – MC9 – Monstrous Compendium – Spelljammer Appendix (1991) – Creature Other appearances Variants Description

TSR 2122 – MC10 – Monstrous Compendium – Ravenloft Appendix (1991) This appendix to the Monstrous Compendium series was designed for use with the Ravenloft campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 32 5-hole-punched loose-leaf pages, unnumbered, and included a 1-page "How To Use This Book" section, a 1-page set of tables for Ravenloft random encounters, and a 2-page section on developing and describing encounters to fit the Ravenloft genre, with the remainder of the set consisting of the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. The contents were republished in 1996 in paperback format within the Ravenloft Monstrous Compendium Appendices I & II.

Luis Javier Flores Arvizu named the continuous presence of supernatural beings as one of the factors that made Ravenloft a very well received role-playing game setting during the 33 years of its existence.

- Creature Other appearances Variants Description

TSR 2125 – MC11 – Monstrous Compendium – Forgotten Realms Appendix II (1991) This appendix to the Monstrous Compendium series was designed for use with the Forgotten Realms campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 32 5-hole-punched unnumbered loose-leaf pages, and 4 full-page illustrations on heavier card stock. It included a single-page table of contents but did not incorporate the usual "How to Use this Book" section or random encounter charts. + TSR 2125 – MC11 – Monstrous Compendium – Forgotten Realms Appendix II (1991) – Creature Other appearances Variants Description

TSR 2405 – MC12 – Monstrous Compendium – Dark Sun Appendix: Terrors of the Desert (1992) This appendix to the Monstrous Compendium series was designed for use with the Dark Sun campaign setting for the second edition of the Advanced Dungeons & Dragons game. The pack consisted of 96 5-hole-punched loose-leaf pages, unnumbered, and included a 4-page "How To Use This Book" section with random encounter charts, with the remainder consisting of the descriptions of the fictional monsters. Also included were 4 full-page illustrations on heavier card stock. + TSR 2405 – MC12 – Monstrous Compendium – Dark Sun Appendix: Terrors of the Desert (1992) – Creature Other appearances Variants Description

TSR 2129 – MC13 – Monstrous Compendium – Al-Qadim Appendix (1992)