The Welcome to the Universe Tour received positive reviews from critics, who praised Thirty Seconds to Mars' energy onstage and the production of the show.

[4] A limited number of tickets per city were made available for $2 each in a special internet pre-sale sponsored by MTV2 and Thirty Seconds to Mars beginning on September 16.

With a powerful line up of phenomenally talented opening bands and having an environmentally acceptable 'green' tour, we are looking forward to yet another chance for us to share something unique with our family of fans that have supported us so passionately and also invite and introduce many others to the world of Thirty Seconds to Mars.

[8] In addition, Rock Kills Kid, The Pink Spiders, The Receiving End of Sirens, Envy on the Coast, Men, Women & Children, and Street Drum Corps joined the tour for select dates.

Jay Cridlin of the St. Petersburg Times praised the performance at the Jannus Landing, saying that Thirty Seconds to Mars proved to be "a legitimate musical force.

"[9] Karen Bondowski from Livewire gave a positive review of the concert at the Eagles Ballroom in Milwaukee and complimented songs like "A Beautiful Lie", "Attack", "From Yesterday", "Buddha for Mary" and "R-Evolve".

"[11] Karah Leigh from the Houstonist gave a positive review of concert at the Verizon Wireless Theater and wrote that the band "completely blew us away", saying that they "did an amazing job."

[12] Matthew J. Palm of the Orlando Sentinel gave a positive review of the concert and wrote that "[Jared] Leto doesn't follow rules.

"[13] In support of the Welcome to the Universe Tour, Thirty Seconds to Mars hosted an episode of MTV2's T-Minus Rock on October 25, 2006 at the MTV Studios, Times Square in New York City.