The deluxe edition of the album features further guest appearances from AJ Tracey, Rich the Kid, Randolph and Crypt.

Critics concluded that Dissimulation "marks a serious leap forward for KSI" and remarked that the album has "cemented him his place as a force to be reckoned within the music industry".

The album has been certified gold by the British Phonographic Industry (BPI) for exceeding sales of 100,000 units in the UK.

And then halfway through there's "Wake Up Call", and that's when it changes, as if I've woken up from what you see online and I realise it's me and I show a bit more about my personal side – the things I don't like talking too much about publicly.

[8] "Wake Up Call" is said to be "KSI's message to the doubters that he is still here and proving people wrong", and "Cap" "addresses those that deceived him" and talks about "how he always bounces back".

This song is a reminder that he quickly evolved from YouTube sensation, to boxing champion, to a bonafide, respected artist".

[6] Metro said that "Millions" "sees KSI open up about his mental health, with some brutally emotional lyrics", and HITC said that the song "shows the darker side of show business, with the hook of the song explaining that despite his wealth, KSI still struggles with things".

"Down Like That", featuring American rappers Rick Ross and Lil Baby and British singer-songwriter and record producer S-X, was released as the album's lead single on 8 November 2019.

[18] The video places the four artists in a dystopian and apocalyptic setting, amongst motorcycles, burned out cars and bright-orange trash can fires.

"Down Like That" charted at number 10 in the United Kingdom,[19] where it has been certified silver by the British Phonographic Industry (BPI),.

[20] "Wake Up Call", featuring American rapper and singer Trippie Redd, was released as the album's second single on 31 January 2020 alongside an accompanying music video.

[21] The video is a comedy-musical film, which stars the two artists and a dance troupe, all dressed in memorable costumes.

[19] "Poppin", featuring American rappers Lil Pump and Smokepurpp, was released as the album's third single on 27 March 2020.

"Houdini", featuring British artists Swarmz and Tion Wayne, was released as the album's fourth single on 24 April 2020 alongside an accompanying music video.

The video places the three rappers in a studio with overhead blue neon lights, an expensive car and models.

A music video for "Cap", featuring American rapper and Migos member Offset, was released on the same day as Dissimulation.

Writing for Clash, Amar Mehta felt that while areas of Dissimulation are "lifted by the heavy weight features, some might be shocked by KSI's ability on the mic".

[4] The News International's Kathy Iffly wrote that KSI has done a good job at "[proving] the naysayers wrong" and remarked that Dissimulation has "cemented him his place as a force to be reckoned within the music world", awarding the album a rating of seven out of 10.

[31] Marwar Hamad of Gulf News called Dissimulation "sonically diverse and lyrically tight" and observed that KSI has "evolved his antagonising flow to a new degree, showcasing his own growth and confidence".

[36][37] On 31 July 2020, Dissimulation was certified silver by the British Phonographic Industry (BPI) for sales of 60,000 album-equivalent units in the UK.

[45] Dissimulation also reached the album charts of 11 other European countries: Austria, Belgium, Denmark, Estonia, Finland, Iceland, Lithuania, the Netherlands, Norway, Sweden, and Switzerland.