Adult PC Game: Nature of Man: The 22nd v0.01 Alpha by Kodo Archive

In the early 22nd century, after the 4th World War, the Cormaine Republic and Uvkos Union became the two dominant sovereign states. The Republic and the Union successfully invaded the majority of its neighbor countries. After the relentless wars, the two states made a truce to enjoy their triumph, which will last before the 4th quarter of the century.
The two sovereign states made technological advances in the following years. The advancement paved the way for some of the most notable inventions: Amara, a serum that enhances human abilities; the Sinister, a war machine; and the Chasgate, a portal device used to travel back in time.