Smogpunk

The world is engulfed with poisonous gas and deadly monsters. To survive and find truth about the world, welcome to Smogpunk. The Central Timespace Bureau created the first space-time messenger in 2917 A.D. The moment it's turned on, a repeated message flooded the system: "They triggered the The Great Smog." Soon we understand we live in a reality where the Great Smog was delayed for unknown reasons. Under the collective effort of different realities, the bureau created the "SmogPurge" software, to uplink alternate futures as a means to understand the Great Smog. Pieces of source code were lost in hyperspace transmission, and ended up centuries earlier where bio-engineered dragons and self-conscious military robots were still distant dreams.