[19] In late 2017, Hongjoong, Mingi, Wooyoung, and Jongho competed on the survival reality show Mix Nine, placing 42nd, 63rd, 72nd, and 43rd out of all male contestants, respectively.

[34][35] The tour was then extended through April with the addition of European shows in London, Lisbon, Paris, Berlin, Amsterdam, Milan, Budapest, Stockholm, Warsaw, and Moscow.

[73] On October 31, Ateez released a special Halloween music video version of "The Black Cat Nero", featuring the original artist Kim Jong-kook.

[74] On November 15, it was announced that member Mingi would temporarily suspend promotional activities with the group in order to receive treatment for and recover from symptoms of psychological anxiety.

[81] On March 1, their sixth EP, Zero: Fever Part.2, was released with a music video for promoted single "Fireworks (I'm the One)" (Korean: 불놀이야; RR: Bulnoriya).

[90] The competition show Kingdom: Legendary War that Ateez participated in alongside five other K-pop boy groups first aired on April 1.

[98] On July 28, Ateez released their first Japanese single "Dreamers", which served as the fifth ending theme for the 2020 reboot anime series Digimon Adventure.

[99] On August 4, Ateez announced an album collaboration with Kim Jong-kook titled Season Songs, with lead single "Be My Lover" (Korean: 바다 보러 갈래?

[100][101] On August 19, it was announced that Ateez collaborated with American a cappella group Pentatonix on the single "A Little Space", set for digital release the following day.

[109] On November 14, it was announced on their virtual concert "Fever: eXendtion edition" that the group's third world tour, The Fellowship: Beginning of the End, would be held in 2022.

The Fellowship: Beginning of the End world tour continued with six sold-out shows in Chicago, Atlanta, Newark, Dallas and Los Angeles in the United States in January.

[128] Jongho then released his first solo soundtrack song, "A Fairy Tale of Youth", for TVING's variety show Young Actor's Retreat on September 16.

[137][138] They embarked on the North American leg, comprising eleven shows in Oakland, Anaheim, Phoenix, Dallas, Chicago, Atlanta, Newark and Toronto.

[152] On February 10, the group embarked on the European leg of the Fellowship: Break The Wall world tour in Amsterdam, followed by eight shows in Berlin, Brussels, London, Madrid, Copenhagen and Paris.

[156] On March 22, the group released Limitless, their second Japanese single album, including the opening song of the same name they recorded for the anime Duel Masters WIN.

They performed their rendition of the song "Highway in the Gale", originally sung by Yoo Jung Seok and won their fourth trophy making them the K-Pop idol group with the most wins on the show.

[169] On July 8, Ateez opened their Asian leg of The Fellowship: Break The Wall world tour in Taipei, followed by concerts in Hong Kong and Bangkok.

On August 23, they continued on with the Latin American leg of the world tour with shows in Mexico City, São Paulo, Santiago and Bogotá.

[196][197][198] The group also became the first South Korean musical act to score three new top 10 titles on the UK Official Albums Charts ranking in the span of a year.

[207] On July 14, Ateez embarked on their North American Leg of the Towards the Light: Will to Power world tour with shows in Tacoma, Oakland, Los Angeles, Phoenix, Arlington, Duluth, New York, Washington D.C, Toronto and Rosemont.

From Middle Eastern flavors, traces of indie pop, tropical house, synthwave, and trap-infused slow jams they have created a strong singular identity without sacrificing creativity and variety.

Honestly, I think we've enjoyed challenging ourselves to try new things because there's no need to confine ourselves to a specific genre if the music can highlight and bring together the strengths of the individual members.

Their work meets the K-pop industry's standards of cinematic production and penchant for hidden narratives, but the symbolism lies in their movements.They move like clockwork, intricate details woven in seamlessly in every piece of choreography and their facial expressions are striking.

While precise choreography has typically been the industry standard, the members of the group aren't afraid to let their individual strengths shine onstage.

[221] The Clash Music report on Ateez' Towards the Light: Will to Power world tour in Washington D.C talks about the storyline that is woven into each project and performance which adds to the worldbuilding experience for the audience.

They've created an expansive universe that explores themes of fixation, discovery, being outcasts, ambiguous morality, and obsession, all of which transcend language barriers to resonate with people worldwide.

[239] On August 31, 2020, it was announced that Ateez members Mingi and Yeosang would participate in Star Bookstore, a relay donation campaign in which celebrities read books to children in disadvantaged situations.

[241] On September 14, Ateez were announced as ambassadors for Polished Man, an initiative raising funds for trauma prevention and recovery programs for young survivors of violence.

[245] On May 15, 2021, Ateez appeared on Identity 2021, a live stream fundraiser hosted by Amazon Music in honor of Asian Pacific American Heritage Month.

[247] In November 2022, in the wake of the Seoul Halloween crowd crush, Ateez donated ₩100 million to the Hope Bridge Korea Disaster Relief Association, using profits from their concerts to support those affected by the accident.