The group comes from Berlin-Kreuzberg and has been active since 2003.  It is unclear how many people belong to the group. Most of 1UP's graffiti in public spaces is illegal as it has not been approved by the land owners. In 2011 1UP released the film "One United Power", which documents the work of the group. For this film, the group traveled internationally and painted in Paris, Istanbul and Thailand, among others.  The premiere took place on 10 December 2011 at the Babylon cinema instead. In September 2014, the Urban Spree gallery in Berlin exhibited some works by One United Power under the title “I am 1UP”.  In May 2015 the second edition of the illustrated book "I am 1UP" was published by Publikat-Verlag.
By August 2017, the police had counted over 300 criminal charges against 1UP. Nevertheless, the Berlin State Criminal Police Office has not been able to capture the group since 2003, as the changing members come from home and abroad and leave little traces that could lead to their capture. The sprayers are always masked, wear gloves and manipulate the video surveillance in advance . 
Since May 2018 a touring exhibition called "One week with 1UP" has been touring around the world through cities such as Berlin, Paris, Tokyo, New York, Milan, etc., where pictures are shown that were created in collaboration with the famous street art photographer Martha Cooper emerged. The book of the same name was published at the same time as the exhibition. In individual cities, art objects are also exhibited that are related to illegal actions, such as B. three-dimensional letters from hundreds of used cell phones in the group.
1UP mainly applies large-format graffiti with its name to exposed places in public spaces, for example on trains or as so-called “rooftops” on eaves.  Both conventional spray cans and paint rollers are used for this purpose.  Silver paint is often used in the actions because it covers and reflects well.  Elaborately shot videos of the group's actions can be found on the Internet, some of which are carried out during the day. In the book "King Kool City Berlin", the group commented on the choice of areas for their graffiti: 
“The urban space belongs to everyone and can be painted. Graffiti is not destruction. "
- Literature from and about 1UP in the catalog of the German National Library
- 1UP spray campaigns at Urbanshit
- Video interview with 1UP on ilovegraffiti.de, 6:33 minutes
- 1UP spray campaigns on YouTube ( AggroTV )
- C. Eickhoff, R. Wolf: Graffiti DVD from "1UP": How the hell did they do it? In: The daily newspaper . December 9, 2011, accessed November 3, 2016 .
- Art or graffiti? The crazy, confused world of the sprayer scene. In: Berliner Kurier . September 25, 2016. Retrieved November 10, 2016 .
- 1UP exclusive. In: taz.blogs. December 9, 2011, accessed November 3, 2016 .
- I AM 1UP. In: www.urbanspree.com. Retrieved November 3, 2016 .
- Norbert Koch-Klaucke: Kreuzberg sprayer gang “One United Power” - BVG, S-Bahn and police are powerless. In: Berliner Zeitung . August 25, 2017. Retrieved August 31, 2017 .
- Dominik Mai: Street Art in Berlin - Discover the street art of Kreuzberg on a route. In: Berliner Zeitung. July 11, 2016, accessed February 21, 2017 .
- Jaime Rojo, Steven Harrington: 1UP In Berlin: ‘All City’ Doesn’t Even Begin to Cover It. In: The Huffington Post. 24. August 2016, abgerufen am 3. November 2016 (englisch).
- Alexander Krex: Berliner Sprayer: Im Farbrausch. In: Der Tagesspiegel . April 8, 2012, accessed November 10, 2016 .