Walsh Trott Chick Smith is understood to have won the 2m advertising account for computer and video game software company Gremlin Interactive.
The agency is believed to have pitched against Summerfield Wilmot Keene, Court Burkitt & Company and Mustoe Merriman Herring Levy.
The Sheffield-based company makes games on CD-Rom for PCs and dedicated games consoles, such as Sony PlayStation.
It secured the exclusive European rights to publish a CD-Rom version of Tamagotchi – the world’s best-selling virtual-reality pet which needs to be “fed” and “exercised” each day to be kept alive.
It has also produced a range of games including Men In Black, Judge Dredd, Ninja, several Nigel Mansell racing games and football games Actua Soccer and Premium Manager.
The company was formed 13 years ago by husband and wife team Ian Stewart and Jenny Richards-Stewart with an investment of 1,000. In July last year, Gremlin floated on the UK stock market, valuing the business at about 35m. It went on to secure a joint venture with Fox Interactive to publish its sports titles in North America.