Vikernes has stated that he had never played any live shows with Burzum, though at one point was interested in it, so Samoth of Emperor joined the band as their bassist, though only appearing on the Aske EP. Additionally, Erik Lancelot was hired to be the band's drummer, though did not record on any Burzum material, and along with Samoth did not play a live show. Vikernes had by then lost his interest in playing live concerts, and stated that he "didn't even need session musicians anymore". Therefore, Samoth and Lancelot had parted ways with Burzum. Det som engang var was released as Burzum's second album in 1993, recorded in 1992.
15 May 1994 saw the release of Hvis lyset tar oss, a new album of previously recorded material from 1992. Burzum remained as a solo project until 1994, when Vikernes was arrested for the murder of Euronymous and the burnings of several churches in Norway. During his time in prison, Vikernes released his next album, titled Filosofem, on 1 January 1996. Recorded in March 1993, Filosofem was the last recording Vikernes made before his imprisonment. Burzum / Aske, a compilation comprising the Burzum album and Aske EP, was released in 1995. While imprisoned, Vikernes managed to record two other albums in a dark ambient style. They were released as Dauði Baldrs (1997) and Hliðskjálf (1999).
In 1998, all Burzum albums released up to that point were re-released as vinyl picture discs in a special box set called 1992–1997; however the Filosofem album didn't contain "Rundtgåing av den transcendentale egenhetens støtte" due to its length.
Soon after being released Vikernes started writing new tracks, nine metal tracks and an ambient intro and outro, for an upcoming Burzum album. According to Vikernes' recounts, several record companies were interested in releasing his first album in eleven years. He stated about the new album, "I want to take my time, and make it the way I want it. It will be metal, and the fans can expect genuine Burzum."
The album was going to be originally titled Den hvite guden ("The White God"), but he later decided to change it to Belus, which was released by Byelobog Productions (byelobog is the transliteration of "белобог" in Slavic languages, meaning "white god") on 8 March 2010. It was also announced that a movie would be released in 2010, based on Varg Vikernes' life in the early 1990s. The movie would mainly draw inspiration from the book Lords of Chaos, with the film being of the same name. Vikernes expressed his contempt towards both the movie and the book upon which it is based.
A second new album of original Burzum material, Fallen, was released on 7 March 2011, followed by a compilation album, From the Depths of Darkness, containing re-recordings of tracks from Burzum's self-titled album and Det som engang var, on 28 November 2011. A third new studio album of original material, titled Umskiptar, was released in May 2012. Sôl austan, Mâni vestan ("East of the Sun, West of the Moon"), Burzum's first electronic album since 1999, is scheduled for release in May 2013. On April 27th of 2013, a song was posted on the official YouTube channel of Vikernes, Thulean Perspective, titled "Back to the Shadows." In a blog post, Vikernes stated that "Back to the Shadows" will be the last metal track released by Burzum.
Burzum's music features characteristics common in black metal, including distorted, tremolo-picked guitar riffs, harsh vocals and the use of double bass blast beat techniques in the drumming. Earlier Burzum albums feature very low production quality, which has improved in albums created after Vikernes' release from prison. Burzum's early music shows heavy Tolkien influence; for example, the name "Count Grishnackh" is taken from an orc character called Grishnákh in Tolkien's works. The choice of the name for the project reflects both this influence and the desire for anonymity: Burzum is a word of the Black Speech of Mordor meaning "darkness" (though Vikernes views what Christians consider "darkness" as "light"), and is one of those found on the Ring-inscription of the One Ring (the final part of the Ring inscription being "...agh burzum-ishi krimpatul", or "...and in the 'darkness bind them"). Some of Burzum's early songs featured titles like "En ring til å herske" ("One Ring to Rule").
Musically, Burzum has progressed from primitive, raw black metal to classical-influenced ambient music characterised by minimalist tendencies and dark atmospheres. Vikernes' music is characterised by hypnotic repetition and simple yet profound song structures; this trademark sound has been present on Burzum's black metal and electronic albums alike. Vikernes has described Burzum as a kind of "spell" or recreation of an imaginary world tied in with Pagan history. Each album, he claims, was designed as a kind of "spell" in itself, with each beginning song intending to make the listener more susceptible to "magic", the following songs to inspire a "trance-like state of mind", and the last song to carry the listener into a "world of fantasy" (dreams, for the listener would fall asleep—Burzum was supposed to have been evening music). Vikernes claims the intent to create this fantasy world came from dissatisfaction with the real world. He has stated the "message" of Burzum can be found in the lyrics of the first song of the first album ("Feeble Screams from Forests Unknown").