A futuristic and science fiction-inspired music video for "Radioactive" premiered on 10 December 2012, depicting her as a robotic femme fatale in a post-apocalyptic landscape.

[2][3] Several remixes, which were done by Baggi Begovic, Lucien Foort, the Flexican, Waze & Odyssey and Zed Bias, accompanied the single's release as part of an extended play (EP) in Ireland and the United Kingdom on 8 February 2013.

[4] Musically, "Radioactive" is a rhythmic upbeat neo-disco, pop and urban song with a house production,[5][6][7] starting with a 30-second opener and finishing with an electro sound.

"[11] Robert Copsey from Digital Spy complimented the song's "euphoric" synths and "thumping" electro bass and explained that "Ora tak[es] on the role of [a] club diva.

"[12] Alex Macpherson for Fact commented that Ora "attempt[ed] to cop the second-hand swag of every big name she can think of, [including] Lady Gaga's machinic hedonism on ['the song'].

Next, the video cuts into a red-lit scene, in which the singer spins in a floating chair against a backdrop of industrial waste accompanied by two guards next to her, who wear gasmaks and hold torn flags.

[24][28][29] Both Vicki Valery from Vibe and Shepherd from Spin commended Ora's attire worn in the video and created by American designer Asher Levine.

[31] While complimenting Ora's styling, Lansky of Idolator stated that the settings and effects used in the video were "intended to look futuristic" but felt that "they just look[ed] campy".