From the company website:
Threewave provides multiplayer FPS content to top brands in the video game industry. We have strong relationships with other industry leaders such as Valve Software (makers of Half-Life), Epic Games (creators of Unreal), and id Software (creators of Doom and Quake).
Through the creation of innovative and compelling multiplayer experiences, Threewave Software develops top-quality multiplayer FPS content for discerning players and the demanding online community. We are currently investing in a variety of projects, including next-generation console titles for the Xbox 360 and PlayStation 3. Threewave has several unannounced original IPs in development.