Nitrome

Nitrome's creation stemmed from a conversation between Matthew Annal and Heather Stancliffe, in which Annal suggested that they make a game for mobile phones. Stancliffe was initially hesitant, but was persuaded that it could be a successful idea. The temporary website for their upcoming project was first launched on 3 April 2005, with a preview video of Chick Flick, their intended first game. Since then, Nitrome has made 146 flash games, and are venturing into mobile phone and PC gaming, as their current flash games aren't providing enough revenue. In September 2011, Annal was joined by his brother, Jonathan Roy Annal. On 24 November 2011 Nitrome released their 100th game, Nitrome Must Die, in which players shoot enemies from their previous 99 games. In 2015, Nitrome released their 140th game, Fluffball, a previously unreleased game from 2007. Their first published game, Ultimate Briefcase, was released in 2016. In 2017, a teaser for the game Bomb Chicken was released. In 2018, it was revealed that same game would arrive on the Nintendo Switch.

In May 2020, the company announced a partnership with Poki B.V, an Amsterdam-based online game publisher, in order to port their Flash-based games to HTML5.

In 2022, Nitrome partnered with Limited Run Games to distribute Gunbrick: Reloaded (a remastered version of their flash game Gunbrick) on physical Nintendo Switch cartridges. This was not a part of the Limited Run collection, however. LRG only helped with distribution.

The games made by the company are divided into four main categories. "Hearted" are the games that have received the most hearts from the heart button upon every game, and are thus considered the most popular. "All Games" is a list of all games produced by Nitrome, while "Multiplayer games" are designed for more than one person to play at once. Last, "Touchy", released in 2012, featured games that are playable on Nitrome's mobile phone app, Nitrome Touchy. Games can be in more than one category. On 8 July 2015 Nitrome announced that Nitrome Touchy was officially discontinued. All links and services related to Touchy were taken down. Turn-Undead was the final Touchy game, released October 2014.

Nitrome has made games for MTV Arcade, PCH Games and Miniclip.

Most of the games are divided into levels (usually between 10 and 100), and also give the player the option to replay any level they have completed, even if they have lost. Some games also feature the concept of bosses.

In July 2009, Nitrome Ltd released Twin Shot 2, their first game to use MochiCoins, a system allowing players to pay for extra content in browser games. Matthew Annal said that Nitrome were "trialling" and that they "don't intend to use it in every game". They used MochiCoins again in B.C. Bow Contest, which they have updated twice. MochiCoins, however, were discontinued by Mochi Media, preventing Nitrome from using them in any more of their games. As a result, Twin Shot 2 and B.C. Bow Contest were updated so their extra content would instead be paid with (free to obtain) in-game currency.