The campaign, created by Erasmus, is designed to lure people with exclusive content on the brand's new website, . Media buying is handled by Vizeum.
The 60-second cinema creative features street dancer Zoe Green, jiu-jitsu champion Roger Gracie, BMX personality Mark Webb and Gallows guitarist Steph Carter, pushing themselves to their limits within their specialism.
The website will host three three-minute-long films, consisting of interviews and live footage of the personalities used in the ad.
The activity comes after , with the Cineworld chain screening a four-minute short film before features over the next four months and selling its drinks.
Relentless is also launching a competition via its Facebook page for consumers to win a trip to Las Vegas and see Gracie perform live.
Further outdoor and sampling activity will launch to support the brand's new sugar-free variant, Libertus, using the strapline: "All impact, no sugar".
Sam Grant, spokesperson at Relentless, said: "This campaign champions the unique Relentless Energy Drink spirit of 'No half measures' with passion and vision, set to stir and awaken consumers with the brand's energetic spirit.
"We're excited to have created a visionary creative ad whilst the new site is set to deliver enthralling content to audiences across the globe."
In March last year, Relentless launched an online lifestyle magazine called This Is The Order.
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