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A RolePlaying Game (RPG) purist might argue that the early versions of The Fantasy Trip (TFT) – Melee and Wizard weren’t true RPGs, but there is debate on the subject. Later editions and versions definitely fell well within the RPG definition. You can learn more about TFT at https://www.thefantasytrip.game/, https://rpggeek.com/rpg/445/fantasy-trip, or https://en.wikipedia.org/wiki/The_Fantasy_Trip. The Wikipedia article doesn’t include the latest Kickstarter campaign – https://www.kickstarter.com/projects/warehouse23/the-fantasy-trip-adventures that recently ended and will be available on Backerkit in early February 2019, only the 2018 campaign. At present, only a few items are available http://www.warehouse23.com/products?keywords=the+fantasy+trip&taxons%5B%5D=558399705-sb, but it’s expected that the first Kickstarter campaign – https://www.kickstarter.com/projects/sjgames/the-fantasy-trip-old-school-roleplaying will change that as soon as the they receive copies of the game that are being printed. Once that happens, you should be able to find them on DriveThru RPG (DTRPG): https://www.drivethrurpg.com/browse/pub/12199/Steve-Jackson-Games.
In an unusual twist, Steve Jackson who designed the games was able to get the rights back to the TFT system: https://en.wikipedia.org/wiki/The_Fantasy_Trip#Return_to_Steve_Jackson_Games.
I lost my copies of the various TFT game components over the years. I managed to find some of the items affordably on EBay several years ago. I didn’t find the original Melee or Wizard which would have cost a small fortune at the time.
Melee and Wizard were some of the easiest rules available for learning how to play an RPG.