Valve, developers of the Half Life series, among others, have bought up another developer. This time it's turtle Rock Studios, the team behind the highly anticipated Left 4 Dead, scheduled for release sometime this year.

"Valve has had great success bringing in projects and teams such as Team Fortress and Portal. As I spent time working and talking with the creators of those products over the past several years, it became clear that this was the right next step for myself, my colleagues at Turtle Rock, our customers, and our products," said Michael Booth, founder and CEO of Turtle Rock Studios. "We are excited to be a part of such a visionary and forward-thinking company."

Hopefully Left 4 Dead will live up to expectations and the aquisition will be a good one!

Through press release.