The most interesting element during the demo was the appearance of physical anomalies, Nuclear Union's version of environmental puzzles. The impact of a nuclear attack doesn't just destroy life and mangle buildings; such a profound expulsion of energy also disturbs the forces of nature, creating pockets in space with their own gravitational fields. They don't pose a direct threat to the player, and are completely optional, but resolving anomalies rewards you with items and special abilities. By manipulating objects orbiting the core of an anomaly, you can neutralize its gravitational field and gain access to the prize within. Just make sure you watch your back while doing so, lest you risk attack from the hordes of mutants roaming the land.
Most of the enemies in Nuclear Union are hulking, bipedal beasts, but there's no shortage of freakishly sized spiders and other real-world creatures lurking about. The story will lend itself to face-offs against other Soviet survivors, but 1C was unable to elaborate on this at the show.