Union City, the 'steel sky' of the title, is a classic dystopian cyberpunk setting full of selfish, morally flexible, and hilarious characters who don't much care for Rob, Joey, and their unusual ways. Reich proceeds to hunt him down, all the while referring to him as Overmann.

Climbing from the wreckage, he retreats to a nearby factory amidst a hail of laser fire. Without warning, the chopper spins out of control and crashes in Union City's industrial district, killing the pilot and all the passengers but two: Foster and an over-zealous Security agent named Reich. Overcome with emotion, Foster is restrained by the guards as they make their way back to the city. After kidnapping Foster, destroying his robot's shell, and setting off in a helicopter, the leader of the forces gives the order to detonate an explosive, wiping out both the tribe and the land on which they lived. They are brutally set upon by a team of Security agents from Union City, a sprawling metropolis with millions of inhabitants, looking for someone named Overmann. They inhabit a barren wasteland known as 'The Gap', a deserted area that was once part of the Australian outback, a harsh place where daily survival is a struggle. He is raised by the tribe and comes to look upon them as his family, learning skills such as hunting and building himself a robot from discarded scraps found in local garbage dumps. Rob was rescued by a tribe of bandits as a child after he was found as the only surviving member of a helicopter crash, on which his mother was also a passenger. The player controls a character called Rob Foster. The artwork and general style was partially created by Dave Gibbons, whose illustrations grace the PC CD-ROM version's introduction video, with the subtitles using comic-book style EMPHASIS on KEYWORDS. It came in two basic versions for both of those platforms: a text-heavy disk-based affair with minimal sound effects and a more lavish CD-ROM production with full music and speech, the latter of which was unusual considering the limitations of most computer systems of the era.

The game was released for PC DOS and Amiga platforms in 1994. Robert Foster, exchanging angry words with his belligerent robot Joeyīeneath a Steel Sky is a British Point-and-Click video game created by Revolution Software.

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