Adventure is considered the first action-adventure ever created and it's one of the most important titles of the video game history. Developed by Warren Robinett for Atari, it was released in 1979-1980 for the Atari 2600 console.
Pitfall II: Lost Caverns is the sequel to the award-winning PItfall by David Crane and was developed and published by Activision in 1984 for 9 different platforms including Apple II, Commodore 64, Colecovision and Atari 5200.
The Activision Decathlon, or simply Decathlon, is a sports simulation created by David Crane initially for the Atari 2600 and published in 1983. It was then ported to MSX, Colecovision, Atari 5200 and Commodore 64.