Might and Magic is a role-playing game where a party of adventurers in a medieval fantasy world called Varn is looking for an entrance to the highly coveted Inner Sanctum. Before long, they realize that one of the four kings ruling the countries of Varn is actually an impostor, a creature from outer space. Their task is to find the real king and ultimately stop the mysterious space traveler, revealing the truth about the world's origin in the process. The Secret of the Inner Sanctum features core gameplay similar to Wizardry games, with overworld areas and towns that can be physically navigated. The game has a larger playing environment than some other RPGs, with several towns to explore. The entire game is viewed from first-person perspective, with pseudo-3D graphics used to create maze-like passages.
At the start of the game, the player creates a party of six adventurers and chooses their classes and races. Each character has six main attributes: might, endurance, accuracy, personality, intelligence, and luck, with each class requiring proficiency in a specific attribute for effective functioning.
The gameplay revolves around exploring the game world and leveling up to progress through story-advancing challenges. The party starts in a weak state, equipped with only clubs and having no money. The player is free to explore most of the game's locations in any order, with few hints on how to advance the plot.
Turn-based battles against randomly appearing enemies take place, but enemy reinforcements can appear once their comrades have been slain. It is also possible to try and bribe enemies or surrender to them before entering combat.
The game has no auto-mapping feature and progress can only be saved at inns located in towns.
Might and Magic was released for the Famicom on 1990-07-31 . It features significant differences in its TurboGrafx CD version.