Pastfinder

• Title — Pastfinder • Released — 1984 • Designer — David Lubar • Publisher — Activision • Platforms — Atari 8-bit, Commodore 64, MSX • Genre — Scrolling shooter

The year is 8878, and the player is a member of an elite legion of planetary explorers known as The Pastfinders. His job is to collect artifacts from a mysterious, irradiated planet and deliver them to bases distributed across the lifeless area. Searing radiation and a deadly, mechanized landscape defense are the player's obstacles: the only remnants of an extinct civilization.

• Illustration — Atari 8-bit gameplay The goal of the Pastfinder is to collect historical artifacts and deliver them to bases scattered around the planet. Two major obstacles stand in the way of this mission. 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. Some of these can be destroyed, others simply bypassed or jumped over. The other obstacle is the land itself, large areas of which are intensely radioactive. The player is equipped with a radiation meter and alarm, as well as anti-radiation devices. 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. After selecting a square of the map to explore, the player is presented with a weapons screen and can choose their equipment. To replenish supplies, the player can collect spare parts that are scattered around the planet. The game ends when a player loses all their ships. Additional ships can sometimes be found on the planet's surface and are also earned every 5000 points.

David Lubar began work on Pastfinder with a simple top view. Then one of his colleagues suggested that he try a more 45-degree back view. At first, it was a view of just the main character, but then Lubar began adding obstacles in the background. Using a unique Atari 8-bit hardware feature, he was able to make the 3D collisions very accurate. The program checked to see if the player was in collision with an object and if his shadow collided with the shadow of that object. Lubnar wanted the game to be titled "Shadow Walker" but Activision did not agree. Pastfinder was released about the same time as David Crane's Ghostbusters and Activision focused all of their advertising efforts on that title.