[2] Users could choose from one of six virtual pet monsters (Katsuma, Poppet, Diavlo, Luvli, Furi, and Zommer) they could create, name and nurture.

Once their pet had been customized, players could navigate their way around Monstro City, take daily puzzle challenges to earn 'Rox' (a virtual currency), play games, personalize their room and communicate with other users in a safe environment.

[4] The game was created in late 2007 by Michael Acton Smith, and developed in 2008 by entertainment company Mind Candy and officially launched in April 2008.

[8] On 13 November 2019, it was announced that Moshi Monsters would be closing down on 13 December 2019, due to the end of support for Adobe Flash Player.

The game takes place after the events of the previous title, and its plot involves the Monsters going to Moshlings Theme Park so that they can take a break from looking after the Moshling Zoo, only to get their plane hit by thunder and to find out that the park is now abandoned in terrible condition, so they attempt to restore it to its former glory.

In July 2013, Mind Candy released Moshi Monsters Village on Google Play,[13] a 3D city-builder published by GREE and developed by Tag Games.

In November 2016, Mind Candy released the Moshi Monsters Egg Hunt app, which is for younger children, alongside a companion storybook of the same name.

In December 2017, Mind Candy released Moshi Twilight, a children's app featuring audio-based bedtime stories.

2 Single discs for "Moptop Tweenybop (My Hairs Too Long)" and "Moshi Twistmas" were also included free with the magazines in the UK.

In 2015, Mind Candy revealed that they were preparing to relaunch Moshi Monsters for an older target of ages 4-7, initially as animation with apps and toys to follow.

[19] On 13 November 2019, Mind Candy announced that Moshi Monsters would be closing down on 13 December 2019 due to the end of support for Adobe Flash Player.

In October 2011, Ate My Heart Inc, representing the musician Lady Gaga, were granted an interim injunction by the High Court of Justice of England and Wales to stop Mind Candy, the parent company of Moshi Monsters, from releasing music on iTunes by a Moshi Monsters character known as Lady Goo Goo.

It went on to say that Mind Candy had "been working with the ASA (Advertising Standards Authority) to ensure that we adhere to best practice and have made changes to the Moshi Monsters game accordingly.