Rogue is an influential dungeon-crawling Role-Playing Game originally created by Michael Toy and Glenn Wichman (with later contributions by Ken Arnold) for Unix-based mainframes in 1980.
The original version of Rogue used the ASCII character set (text symbols) to create the world, and that is what you can see here in this first commercial version of game, published by Epyx in 1985.
The King of Grabs 