Flip-Screen Room Graph

Each room is a self-contained screen with its own layout, contents and inhabitants. Crossing an edge swaps the whole display for the adjoining room, and the game holds only one at a time in memory. Structure therefore lives in the connections rather than in geometry: a designer authors a graph of rooms and the doors between them, and the player builds a mental map out of transitions rather than measured distance.

Atari's Adventure, written by Warren Robinett and released in 1980, adapted the text game Colossal Cave into pictures on a console with barely more than a hundred bytes of working memory. Holding a large continuous world was impossible; holding one screen and a pointer to its neighbours was not. Rooms also gave a cheap way to hide things, since a dragon or a key simply exists in a room you have not entered.

Room graphs made worlds that are large without being continuous, and they turned mapping into a player activity, first on graph paper and later through an in-game automap. Discreteness also became an aesthetic tool: a hard cut can conceal what is coming, which is why survival horror and puzzle design kept the form long after hardware could scroll. Cost is friction, since every doorway is a small interruption.