Corridor devices

The two Corridor devices are inventions from the "original" universe that allowed the Four Ancient Travelers to cross from their world to HILT. After three of the travelers fought against the fourth, PG Copper, they buried the two devices in the ground to ensure no one could use them again.

Reappearance of one device
Shortly after that battle, PG managed to return, find one of the devices, and set about traveling through time. Using this device he visited nearly every single time period throughout hiltstory, typically hanging around just long enough to cause some chaos and then move on.

He eventually traveled far into the future and encountered the fledgling Conglomerate race, who offered him a job. If he would find a point in time where they could invade the Snickers galaxy to conquer, they would keep him supplied with cyborg bodies so he could stay alive.

It is unclear at what point in his time travels that PG received this assignment.

The other device
For eons the second device remained missing until it was on board The Conglomerate, the experimental spaceship that the banished Los Lobos nation was stuck on and launched into deep space. How it came to be on the ship is unknown.

Usage of the Corridor devices
When first made, the Corridor devices could be used a mere hour after making a time jump. As PG continually used his, however, it began taking longer and longer to recharge, hence stranding him in a certain time period for longer than he would like.