The release of Valve's co-op zombie shooter Left 4 Dead (PC, X360) has been delayed until this fall, according to a press release from Eastern European publisher Akella.

Valve had previously told Shacknews that the title would arrive in late summer, most likely in August or September. The autumnal season begins on Tuesday, September 23, providing Valve with the opportunity to still deliver the game within the previously established timeframe.

In the announcement today, Akella revealed that upon the Left 4 Dead's simultaneous worldwide release this fall, it will be publishing the title in Russia and other CIS territories. For more on L4D, check out the Shack's hands-on impressions.

"We will be working closely with Akella as we prepare the launch of Left 4 Dead in one of today's fastest growing gaming markets," said Valve marketing VP Doug Lombardi.

"Left 4 Dead is Valve's attempt to fill gamers' desire for a dynamic and engaging co-operative action experience," he continued. "This has been validated by the press, who are calling it one of the most anticipated titles of the year."

Given Akella's focus on PC titles, it is assumed that the Russian publishing arrangement only applies to the PC edition.

"Akella is thrilled to be able to bring this unique game to Russian speaking territories," added Akella publishing VP Vladimir Koudr. "Left 4 Dead is already highly expected throughout the world, and Russian FPS players are eager to play this game."