2010–2015: The Wörld Is Yours, Aftershock, and Bad Magic
In a November 2009 interview with ABORT Magazine's E.S. Day, Lemmy said that Motörhead would enter the studio in February 2010 "to rehearse, write and record" their 20th studio album, to be released by the end of the year. The album was recorded with Cameron Webb and Welsh producer Romesh Dodangoda in Longwave Studio, Cardiff. In an interview with Hungarian television in July 2010, drummer Mikkey Dee announced that the album was finished, with 11 tracks. The album's name was said to be The Wörld Is Yours. On 3 November 2010, Future plc, a UK media company, announced that Motörhead were to release The Wörld is Yours via an exclusive publishing deal with Classic Rock magazine on 14 December 2010. The standard CD release of The Wörld is Yours would go on sale on 17 January 2011, through Motörhead's own label, Motörhead Music.
To coincide with the release of their upcoming album, Motörhead embarked on a 35th Anniversary UK tour, from 8–28 November 2010, and a European tour from 30 November 2010 – 19 December 2010. They also took their tour to the Americas in 2011. In October, the band recorded a slow blues version of their longtime hit "Ace of Spades" for a TV spot for Kronenbourg beer. On 5 December the single "Get Back in Line" was released, followed by the release of a video for the single on 6 December. In December, Mikkey Dee stated to French journalists that Motörhead are planning to release a box-set with several DVDs in 2011. He did not give any details but said that it will come in a "beautiful package including many surprises".
On 17 January 2011, it was announced that Motörhead would be part of the Sonisphere Festival in Knebworth. In August 2011, they headlined the Brutal Assault open-air festival in the Czech Republic. On 2 March 2011 Motörhead performed on Late Night with Jimmy Fallon.
On 9 July 2011, former guitarist Würzel died of a heart attack. In celebration of 35 years' touring, in late 2011 the band released the live DVD The Wörld Is Ours – Vol 1 – Everywhere Further Than Everyplace Else, including performances at the O2 Apollo Manchester, Best Buy Theater, New York City and Teatro Caupolicán, Santiago de Chile. On 19 December 2011, it was announced that Motörhead would play at the German festivals Rock am Ring and Rock im Park in Nürburgring and Nuremberg respectively in June 2012. On 12 January 2012, it was announced that Motörhead were touring the US and Canada in early 2012, along with three other metal bands Megadeth, Volbeat and Lacuna Coil. The Gigantour took place from 26 January to 28 February 2012, but Motörhead missed the final four shows because Lemmy had a combination of an upper respiratory viral infection and voice strain, resulting in severe laryngitis. Lemmy wrote on Facebook, "I'm giving my voice a good rest", hoping he would recover soon to play at the Mayhem Festival, which was held from 30 June to 5 August 2012. Motörhead also took part on 23 June in the Rock-A-Field Luxembourg Open Air Festival in Roeser.
In an April 2012 interview with Classic Rock Revisited, Lemmy was asked if Motörhead were planning to make a follow-up to The Wörld Is Yours. He replied, "We have not started writing any songs yet but we will. We put out an album out every two years. I will continue to do that as long as I can afford an amp." On 28 June 2012, Lemmy told Auburn Reporter that Motörhead will release their next album in 2013 and they had written "about 6 songs so far." On 23 October 2012, Lemmy told Billboard.com that the band had planned to enter the studio in January to begin recording the album for a mid-2013 release. On 28 February 2013, it was announced that Motörhead had begun recording their new album. Motörhead released the live DVD The Wörld Is Ours – Vol. 2 – Anyplace Crazy As Anywhere Else in September 2012. On 18 June 2013, the new album's title was revealed to be Aftershock.
In mid-November 2013, Motörhead were due to embark on a European tour alongside Saxon, followed by a tour in Germany and Scandinavia due to last until mid December 2013 but the dates were postponed and rescheduled for February and March 2014 due to Lemmy's health problems. However, in January 2014, Motörhead announced the cancellation of the new February and March dates of their European tour as Lemmy was still to reach full recovery from diabetes related health problems. But the same month, the band was confirmed for Coachella Festival to take place across two weekends in spring 2014 (12–14 and 19–21 April) in Indio, California, the exact dates to be revealed as 13 and 20 April 2014. In February 2014, Motörhead confirmed a Summer tour 2014 with eight European dates (from 24 June to 10 August) in France (2 dates), Switzerland, Italy, Germany (2 dates), Russia and Ukraine. In March 2014, the band announced a Los Angeles date on 11 April 2014 at Club Nokia. Later on, two new dates on 17 and 18 April 2014 respectively in Las Vegas (Pearl) and San Francisco (Warfield) were added. Still in March 2014, Motörhead announced that three heavy metal bands Megadeth, Anthrax and themselves would perform from 22 to 26 September 2014 at the first annual Motörhead's Motörboat cruise on board the Carnival Ecstasy (self-proclaimed "The Loudest Boat in the World"), due to sail from Miami and visit the ports of Key West and the Cozumel island just off Mexico's Yucatán Peninsula.
In a September 2014 interview on Full Metal Jackie, Lemmy stated that Motörhead would "probably" enter the studio in January 2015 to start work on their 22nd studio album for a tentative late 2015 release. On 25 February 2015, Motörhead officially confirmed that they were in the studio recording their new album in Los Angeles with longtime producer Cameron Webb. On 27 May 2015, the band released teasers on their Facebook page with the roman number "XXXX" on it. On 4 June the new album (which would be their last) Bad Magic was launched for pre-order on Amazon, revealing its title and cover art which also shows the "XXXX", coinciding with the 40th anniversary of the band. The album was released on 28 August 2015. The band performed at the UK's Glastonbury Festival in June 2015. Their final UK gig was at the Eden Project on 27 June 2015.
While touring the album as the "40th anniversary Tour", Motörhead had to cut short their Salt Lake City show on 27 August 2015 (in the Rocky Mountains) due to Lemmy's breathing problems (the result of an altitude sickness) and then they had to cancel completely day-off their Denver Riot Fest set on 28 August 2015. Their tour picked up again on 1 September 2015 at Emo's in Austin, Texas (moved from Cedar Park Center) but the group were again forced to abandon their set after three songs and to cancel subsequent shows (from the show on 2 September 2015 in San Antonio, Texas to the show on 5 September 2015 in Houston, Texas included).
Despite his ongoing health issues forcing Motörhead to cut short or cancel several US shows, Lemmy Kilmister was able to bounce back in time for the trio's annual Motörboat heavy metal cruise from Miami to the Bahamas which ran from 28 September through 2 October 2015 including performances by bands such as Slayer, Anthrax, Exodus, Suicidal Tendencies and Corrosion of Conformity. For this occasion, Motörhead performed live two entire (identical) sets on 30 September and 1 October 2015.
Motörhead continued the "40th Anniversary Tour" in Europe in November and December. They played concerts in Germany, Sweden, Norway and Finland. Their final concert was in Berlin, Germany on 11 December 2015. After Lemmy's death, drummer Mikkey Dee spoke in an interview about him: "He was terribly gaunt. He spent all his energy on stage and afterwards he was very, very tired. It's incredible that he could even play, that he could finish the Europe tour. It was only 20 days ago. Unbelievable." The "40th Anniversary Tour" was planned to continue in January 2016 in the band's home country the UK, the first concert would have been in Newcastle on 23 January 2016.