It's a curious game loosely based on Philip Jose Farmer's science fiction novels, Riverworld, developed by Cryo Interactive, known for creating various games based on science fiction novels like Dune.

In this RTS game, you must gather materials and special historical builders to advance through ages, with the objective of each match being to progress through four different eras. There are three scenarios, spanning simplistically from the Stone Age to a Cyborg Age, requiring you to gather specific materials for each era; for example, stone for the Stone Age, oil for the Industrial Age, and so forth.

It's fun, somewhat challenging, yet straightforward. The mechanics are somewhat poorly optimized, leading to some cheesing tactics being necessary.