SunAge is real-time strategy video game developed by Austrian company Vertex4 and published by Lighthouse Interactive. It has received attention due to its use of 2D sprites and backgrounds. The Federacy is all that is left of the Human race, sealed off in protective domes, away from the harsh environment of future Earth. Attempting to survive on limited resources they must fight to protect their domes. By the time the game starts, there is only one dome left standing. The Raak-Zun are the descendants of those who were abandoned to die in the toxic wastelands when mankind retreated into the domes. After many terrible years of mutation and hardship, a new race was born with the instinct and brute force to survive the dangers of the wasteland: the Raak-Zun. Never forgetting their betrayal, they hate the Federacy above all else. The Sentinel are a race of sentient robots with unknown origin. Little is known about this faction at this time and the reason for their aggressive behavior remains a mystery. They seem to be in possession of extremely advanced technology. SunAge is set on a post-apocalyptic Earth, in which relentless total war between Earth's nations (subtly hinting to a nuclear war) have turned the planet into an irradiated wasteland, forcing the surviving humans to shelter in habitational domes to survive. However, with the passing of years, contact with most domes was lost, leaving the Federal Dome as the last one standing. It's discovered this was due to the assaults of the self-titled Raak-Zun, humans supposedly mutated from prolonged exposure to the irradiated Earth. The Federacy was able to survive so far due to the skills of their hardened commanders, whom must pass the trials of the "Blooding", a live-fire graduation exercise that involves open conflict with the Raak-Zun, to earn their rank. Six months following his successful graduation from the Blooding, Commander Ethan tardily returns to the Federal Dome to find it under siege from the Raak-Zun, whom breached through the tunnel system.