Question: Adventures in Middle-earth is an RPG set after the first Tolkien novel, which was released in what year?

Context paragraphs:
Nightfall in Middle-Earth: Nightfall in Middle-Earth is the sixth full-length studio album by German power metal band Blind Guardian.  It was released on April 28, 1998 through Virgin Records.  It is a concept album based upon J. R. R. Tolkien's "The Silmarillion", a book of tales from the First Age of Middle-earth, recounting the War of the Jewels.  The album contains not only songs but also spoken parts narrating parts of the story.  The cover represents Lúthien dancing in front of Morgoth.  It is widely regarded as one of Blind Guardian's most well-known and well-received albums in their discography.  It is also the first album with Oliver Holzwarth as guest musician, playing bass guitar instead of Hansi Kürsch.  "Nightfall in Middle-Earth" was the first album by Blind Guardian to be released in the US.  The sales encouraged Century Media to release their entire back catalog in the US in 2007, at which point it was remastered and re-released, with an added bonus track.

The Boggit: The Boggit: Bored Too is a text adventure game by Delta 4 released in 1986 for the Commodore 64, Amstrad CPC and ZX Spectrum home computers.  The game is a parody of the J.R.R. Tolkien novel "The Hobbit" and of the earlier game based upon it also called "The Hobbit".  It is the prequel to "Bored of the Rings".

Adventures in Middle-earth: Adventures in Middle-Earth is a tabletop role-playing game published by Cubicle 7.  It is set in J.R.R. Tolkien's Middle-earth, in the time between "The Hobbit" and "The Lord of the Rings".  It is a redesigned version of "The One Ring Roleplaying Game" that is compatible with the Fifth edition rules of D&D, via the OGL.  It was released in 2016.  Books are also released in PDF format as well, often being released in PDF format long before the physical release of the book.

The Adventures of Tom Bombadil: The Adventures of Tom Bombadil (full title The Adventures of Tom Bombadil and Other Verses from the Red Book) is a collection of poetry written by J. R. R. Tolkien and published in 1962.  The book contains 16 poems, two of which feature Tom Bombadil, a character encountered by Frodo Baggins in "The Fellowship of the Ring" (the first volume in "The Lord of the Rings").  The rest of the poems are an assortment of bestiary verse and fairy tale rhyme.  Three of the poems appear in "The Lord of the Rings" as well.  The book is part of Tolkien's Middle-earth legendarium.

Middle-earth in film: J. R. R. Tolkien's novels "The Hobbit" and "The Lord of the Rings", set in Middle-earth, have been the subject of various film adaptations.  There were many early failed attempts to bring the fictional universe to life in screen, some even rejected by the author himself.  The first depictions of Middle-earth on film were realized in 1966 as a short cartoon film.  In 1978 the first big screen adaptation of the fictional setting was introduced in "The Lord of the Rings".  The story was more or less completed with the animated television special "The Return of the King".  In 1985, Middle-earth was depicted in a live-action film for the first time by an adaptation produced in the Soviet Union.  In 1993, a live-action television miniseries titled "Hobitit" was aired by the Finnish broadcaster Yle.

The Hobbit: The Hobbit, or There and Back Again is a children's fantasy novel by English author J. R. R. Tolkien.  It was published on 21 September 1937 to wide critical acclaim, being nominated for the Carnegie Medal and awarded a prize from the "New York Herald Tribune" for best juvenile fiction.  The book remains popular and is recognized as a classic in children's literature.

The Tale of Beren and Lúthien: The Tale of Beren and Lúthien, told in several works by J. R. R. Tolkien, is the story of the love and adventures of the mortal Man Beren and the immortal Elf-maiden Lúthien.  (Early versions of the story, published in the standalone book in 2017, described Beren as a Noldorin elf.)  Tolkien wrote several versions of their story, the latest in "The Silmarillion", and the tale is also mentioned in "The Lord of the Rings".  The story takes place during the First Age of Middle-earth, about 6500 years before the events of "The Lord of the Rings".

Middle-earth Collectible Card Game: Middle-earth Collectible Card Game (MECCG) is a collectible card game released by Iron Crown Enterprises in late 1995.  It is the first CCG based on J.R.R. Tolkien's fictional universe of Middle-earth, with added content from ICE's Middle-earth Role Playing Game.

The Lord of the Rings Trading Card Game: The Lord of the Rings Trading Card Game (a.k.a. LOTR TCG) is a collectible card game produced by Decipher, Inc. Released November 2001, it is based on Peter Jackson's "The Lord of the Rings" film trilogy and the J. R. R. Tolkien novel on which the films were based.  Decipher also had the rights to "The Hobbit" novel but did not release any cards based on it.  In addition to images taken from the films, in 2004 Weta Workshop produced artwork depicting characters and items from the novel absent from the films for use on cards.

Middle-earth calendar: J. R. R. Tolkien invented a number of calendars for his fantasy-world of Middle-earth.  Middle-earth is set on the Earth in a fictional prehistoric era, so a year is the same length as our year.  Appendix D of Tolkien's "The Lord of the Rings" (published 1955) gives details of his invented calendars.

Supporting paragraphs: Adventures in Middle-earth The Hobbit
Answer: 1937