Popular games published by company Digital Equipment Corporation

Colossal Cave Adventure is a text adventure game, developed originally in 1976, by Will Crowther for the PDP-10 mainframe. The game was expanded upon in 1977, with help from Don Woods, and other programmers created variations on the game and ports to other systems in the following years. In the game, the player controls a character through simple text commands to explore a cave rumored to be filled with wealth. Players earn predetermined points for acquiring treasure and escaping the cave alive, with the goal to earn the maximum amount of points offered. The concept bore out from Crowther's background as a caving enthusiast, with the game's cave structured loosely around the Mammoth Cave system in Kentucky.

Moonlander (also known as Lunar Lander) is an early computer game made for the DEC GT40 computer and is the first graphical game in the lunar landing simulator subgenre, as well as the first one in real-time. It is notable for being the first video game with an Easter egg, a lone McDonalds on the moon's surface that can be interacted with or destroyed.