Landstalker was an Action-Adventure game in development for the Playstation Portable by Climax Entertainment, it was to be an updated port of the Sega MegaDrive/Genesis game “Landstalker: The Treasures of King Nole”, and had a proposed release date of Spring 2006 in Japan.
After a lack of updates given by the developer the game was officially cancelled and only a short tech demo video remains to remember its existence.
Thanks to Mittel for the description!
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