MediaCom handles the account, which includes campaigns for games such as "Fifa 14," "The Sims 4" and "Titanfall." The review spans about 20 markets and is being led from EA’s office in Geneva. Last year, the business was valued at £16 million in the UK. Agencies will attend chemistry meetings this week. The gaming giant has been rebuilding after a turbulent 2013, which saw EA cut more than 10% of its workforce and voted the U.S.’s worst company to work for. A push in online gaming has helped boost revenues.