The free quarterly magazine has previously been available in participating stores and venues, but it will now also be available to readers as a digital publication.
Rather than users sharing entire magazines via social networking sites, users can choose single pages of interest to share. The third issue of the magazine, created by Erasmus, contains features on David Byrne, as well as Bat for Lashes.
The energy drink brand is also promoting its application, The Rev, which enables music fans to convert music tracks into audio-visual art via their computers.
Users can download the application, also created by Erasmus, from the brand's website (relentlessenergy.com), to allow them to play The Rev while listening to music.
Bands will be able to employ The Rev to use live performances to produce stunning visuals, controlled in real-time by taking a live feed from a microphone or sound desk. The Rev can then be projected either though screens or directly onto surrounding walls.
Erasmus worked with digital artist Robert Hodgin of flight404 and Andrew Bell of the Barbarian Group, creators of the Magnetosphere software within iTunes 8, to create The Rev.
In December, Relentless launched a feature-length documentary-style film, which followed British punk rock band Gallows, snowboarder Xavier De La Rue, and British surfers Tom Lowe, Mickey Smith and Fergal Smith.
The documentary was screened on Channel 4 on 17 December and is also available to view online.
