You are a survivor living in the remnants of humanity. In an attempt to escape to a better life, you board the Engine Eternal, a train that has the potential to take you to Paradise. During your journey across the Old World, you and up to 3 fellow survivors will stop at several locations and disembark to search old abandoned locations to look for fuel and upgrades to keep the Engine running.

The Engine powers everything onboard the train, so managing your fuel is crucial. Beyond simply being used to travel to new destinations, excess fuel will allow you to power the fabricator, the suit repair machine, and even state-of-the-art technology that allows you to reanimate your lost teammates. If you happen across raw materials during your travels, instead of recycling them as fuel, you have the option of upgrading the Engine, granting you and your team the ability to travel to more dangerous destinations.

Abandoned reminders of humanity's existence litter the Old World. Locations such as houses or bunkers are perfect places to scavenge for leftover fuel and raw materials. But be careful, be quiet, and stay in contact with your fellow survivors at all times; you won't be the only ones there.