Mark Rein, vice president of Epic Games, has said that Microsoft's Windows Mobile 7 device could be a dark horse in the mobile gaming space.
In an interview with Develop Rein advised Google to make improvements to the Android mobile operating system as it was being bogged down by additions made by carriers.
"I think [Google] still has a long way to go," said Rein.
"Another problem with Android is the carriers run wild with the OS and are adding all kinds of bloatware and not-so-great custom user interfaces," he added.
Rein went on to talk up Microsoft and its Windows Mobile 7, which could disrupt the market by bridging the gap between gaming on Xbox 360 and on a mobile device.
"Microsoft could be a major disruptor here. One of the unique things they're doing is creating a proper first-party games organisation for Windows Mobile 7.
"They'll be making serious investments in high-quality exclusive games for their platform like they've done with the Xbox consoles, and they're bridging the social gaming aspects of the 360 and mobile platform through Xbox Live."
Rein went as far as to speculate that Microsoft could compete with and potentially dethrone Apple.
"If they combine that with the best Exchange integration, real Microsoft Office app compatibility and software on the phones and tablets then they could be serious competition to Apple. Plus, they have a huge amount of cash and a desire to not let mobile pass them by."
A video has emerged showing a Microsoft rep running through some of the features of Windows Phone 7.