[4] Prior to the founding, Miller and Sinclair had been working at a design firm called Big Animal who had Sony as a client.

After Ustwo was founded, they were able to gain work from Sony Ericsson from this prior relationship to help design a user interface.

Miller and Sinclair saw the opportunity here to make and sell their own applications directly to consumers via the App Store, and started to explore that area.

The app earned Ustwo £100,000, a product of strong word-of-mouth from works like Creative Review, [5] Techcrunch, BBC, and CNN, according to Miller.

During this time, they developed Whale Trail in 2011, a children's game, which led to a deal with Penguin Group for an ebook and television series,[4] and Blip Blop in 2012.

[17] Lana Polansky of Waypoint criticized Ustwo for adopting progressive language and values to camouflage workplace issues and union busting activities.