Pastfinder is a vertically scrolling shooter designed by David Lubar and published by in 1984 by Activision for the Atari 8-bit computers, Commodore 64, and MSX.

The first is the planet's automated defense system, consisting of multiple hovering barriers, rising and falling columns, opening and closing doors, fixed obstacles, and drones.

At the beginning of the game, the player has access to a very small portion of the planet map, which will be revealed as exploration progresses.

[3] Pastfinder was released about the same time as David Crane's Ghostbusters and Activision focused all of their advertising efforts on that title.

"[4] Commodore Computing International found the game "a good traditional style arcade skirmish with some great graphical effects.