They have released eight albums: Time of Rebirth (2004), Blank Walls (2005), A Far Cry From Here (2007), Dark Folke (2009), Catacombs (2012), Oscila (2014), Continuum (2015), and August is the Cruelest (2016).

The band described the album as "a rich and imaginative musical vision, on which vocalist-guitarist Leslie Low builds his pensive, tender yet elliptical song-craft.

[17] Yeow Kai Chai of The Straits Times praised The Observatory for "delving deep and venturing into the unknown...This sense of unease, a constant calibration between heaviness and lightness, informs how the music switches between jazzy delicacy and far-out phases of post-rock noiseniks.

The band describes the work as "a change in musical direction" and says "the math prog rock of The Observatory's third album A Far Cry From Here has morphed into a fluid mystical beast called Dark Folke.

[25] In the lead-up to Dark Folke's release, The Observatory collaborated with filmmaker Ho Tzu Nyen and theatre director Kok Heng Leun on Invisible Room.

The Observatory's fifth album, Catacombs, is described by the band as containing "a more primal, new dark wave sound...[a] study in delusion, insanity, and obsession [that] provokes and inspires in a deeply enigmatic way.

"[28] Critic Kevin Mathews praised Catacombs by calling it "an uncompromising honest work of art that expresses the deepest feelings and emotions of the artist and lays them bare for its audience to dissect, absorb and devour.

"[30] Yeow Kai Chai of The Straits Times awarded the album four out of five stars, comparing it to late Scott Walker and noting lyricist Leslie Low's references to Dutch occultist Johann Weyer and French philosopher Michel Foucault, writing that "the band have moved out of the mainstream into the furthest frontiers of the universe.

[32] In 2017, music website Bandwagon ranked Catacombs as the best The Observatory album, writing that "it stands as the band’s crowning achievement in framing primal emotions within intricate instrumentation...an incredible singular statement of artful intention and uninhibited honesty".

[35] The Observatory's sixth album, Oscilla, is described by the band as "the imagined swing of our imperfect times", featuring "vibrations of shifting rhythms, synth bass space, oscillators and abused guitars".

[38] The title track references Zomia, historian Willem van Schendel and James C. Scott's term for the huge mass of mainland Southeast Asia that has historically been beyond the control of governments based in the population centres of the lowlands.

[39] Reviewing the album in Today, Kevin Mathews writes, "Oscilla is cutting-edge art that one can conceivably rock out to, which is no mean feat", awarding it full marks.

[40] Yeow Kai Chai gave the album four out of five stars, writing in The Straits Times that Oscilla "scans the deplorable state of the world, questions war and strife, and assesses the value of life.

The launch featured appearances by Hanging Up the Moon's Sean Lam, Dean Aziz, and former member Victor Low on backup vocals.

[51] Recorded in Singapore and Norway during the height of the 2015 Southeast Asian haze crisis, August is the Cruellest, inspired by King Crimson, Soft Machine, Zircon Lounge and others, is described by the band as "a work of political noise, a punishing challenge to look inward and move forward.

"[52][53] The title track, inspired by T. S. Eliot's poem "The Waste Land", was previously performed live at theatre company Drama Box's Singapore International Festival of Arts 2015 production, The Cemetery.

[54][55][56] Reviewing the album on Bandwagon, three critics called this a "proper follow-up to Oscilla" "challenging and disconcerting", "sinister, raw and explosive", and praised how the production, especially the drums, "sounds great".

"Designed to grip you and shock you out of apathy and just make you think––that's the sense of hope," they noted, singling out "Everything is Vibration" and "The Weight of It All" as highlights of "their strongest album yet", giving it ratings of 8/10, 7/10 and 8.5/10.

[59] Interviewing the band in TODAY, Kevin Mathews called August is the Cruellest a "multi-layered work", while he declared it "their most accessible of their recent releases" and "progressive rock with a conscience" that "succeeds at every level" on his blog.

Eddino highlighted the songs "You Have No Heart" and "Wait For The Real Storm" as stand-outs, comparing "Low's layered harmonies" on the former to his Humpback Oak tunes.

[62] Jun Sheng Ng of Juice magazine described August is the Cruellest as an "immediate counterpoint to the prevailing spirit and sentiment widespread through the city" soon after Singapore's golden jubilee celebrations, noting that it "paints a landscape of desolation [and] the infertile and impotent wasteland we are mired in".

[63] Honeycombers praised August is the Cruellest as an "audial commentary on the looming, cataclysmic destruction of the earth" and a "revolutionary record [that] challenges a negative status quo that many have refused to acknowledge".

[64] Released on CD, cassette, double vinyl and digitally, August is the Cruellest was launched at the band's acclaimed The Substation gigs on 18 and 19 March 2016, with special guests Dharma and SA Trio and featuring covers of The Cure and Talking Heads.

"[76] Reviewing the album in The Straits Times, Yeow Kai Chai wrote that Behind These Eyes: The Catacombs Remixes "meddles with the songs to spectacular effect...Overall, it's a rabbit hole to somewhere riskier and more exciting", while Bandwagon called it "stunning".

[79] An hour-long improvisational soundtrack to photographer Philipp Aldup's 2013 exhibition, Gezeitentümpel, released as a seven-track CD-R.[80] This split vinyl single with Norway's MoE features Balinese gamelan-inspired bronze instruments the band built on their song, "Mankind".

In a four-star review, NME writer Azzief Khaliq says, "Over the album’s 22 minutes, The Observatory and Keiji Haino create improvised music that showcases what talented musicians can achieve in such a setting.

He is also a part of the Far East Network (FEN) – a quartet comprising Otomo Yoshihide (Japan), Yan Jun (China), and Ryu Hankil (South Korea) since 2008.

As PAN GU, Low's collaboration with Lasse Marhaug (electronics), Primeval Man Born of the Cosmic Egg, made it to SPIN's Top 20 Avant albums of 2013.

Wang is a former TV presenter of the arts programme "Artitude" on local channel TV12 and also a host of Cathay Pacific's inflight series "World of Travel".

Ray Aziz – Drums, Percussion Veteran drummer in Singapore, his former bands include Swirling Madness, Opposition Party, Sugarflies and Popland.