Beyond Oasis, known in Japan as The Story of Thor: Hikari wo Tsugu Mono (ストーリー オブ トア 〜光を継ぐ者〜, lit. "The Story of Thor: Heir of the Light") and in Europe as The Story of Thor: A Successor of The Light, is a 1994 action role playing video game developed by Ancient and published by Sega for the Mega Drive/Genesis console. The game was later re-released to the Wii's Virtual Console on March 19, 2007 in North America, and April 5 the same year in Europe. The game was also included in Sonic's Ultimate Genesis Collection/Sega Mega Drive Ultimate Collection for Xbox 360 and PlayStation 3; in the European version of the latter, it is entitled The Story of Thor.

The game has action adventure elements similar to The Legend of Zelda series. The player controls Prince Ali and takes him across the maps to fulfill his quest. Along the way the player picks up special items to restore health and magic, special weapons to help defeat enemies, and four magic spirits found in shrines to aid Prince Ali's mission.

Prince Ali's default weapon is his knife, which can perform special attacks and has unlimited usage. Also during the course of the game the player can equip Prince Ali with special weapons such as swords, crossbows, and bombs. Some crossbows (and a sword) can ignite their targets on fire. However, unlike the knife, these weapons do not have unlimited usage and will break after a set amount of uses.

Each of the magic spirits acquired in the game has a number of spells that can attack enemies, restore health, or unlock hidden areas. Each spirit is summoned by the Light Ball (C Button) and is sent away by tapping A, B, and C at the same time or when the magic meter runs out. Each spirit's power can be increased by picking up gems that correspond to the color of the spirit: Blue for Dytto, Red for Efreet, Black for Shade, and Green for Bow.