His third album, a chillout album called Hotel Rooms, was released 22 November 2013. TyDi worked with American producer and DJ BT to collaborate on two tracks on BT's ninth album A Song Across Wires: "Tonight" (with JES) and "Stem the Tides" (with Tania Zygar). In August 2014, he released "Stay" with Dia Frampton, the runner up in The Voice's debut season.
TyDi's fourth album, Redefined, was released on 30 September 2014. The project features vocals by Chris Carrabba and Jordan Witzigreuter. The album reached No. 5 on both the US and Australian iTunes dance charts on day of release. According to TyDi, Redefined represented a change in his approach to music creation, focusing more on songwriting rather than just hooks and rhythms. The album took three years to write and produce, during which time approximately 300 songs that were started were whittled down to the final 20. The album was not genre specific with house, progressive house, pop (ish), trance and chillout tracks all making the final cut. The title track, "ReDefined", reach number one on the dance airplay charts in the US in April 2015. Following the making of the music video for the song, it was revealed that Redefined was the final piece in a planned sequence. The trilogy begins with "Live This Lie" and ends with "Stay" but "Redefined" was the missing middle piece completing the story.
On 20 November 2014, TyDi announced that he had made a promise to all of his trance fans and would be producing an EP in time for Christmas with all money being donated to children in need. That EP, The Promise, was released on 14 December 2014. It features five trance tracks in his "old" style (circa 2008) and features not only solo tracks but collaborations with Audrey Gallagher, The Ready Set, Dennis Sheppard and Jennifer Rene.