2K Games has delayed Evolve, the upcoming cooperative shooter from Turtle Rock Studios, the developer responsible for Left 4 Dead. Originally scheduled for release on October 21, Evolve will now be released on February 10, 2015.

This news comes as part of 2K parent company Take-Two’s announcement of its financial results for the most recent quarter. No reason was cited for the delay, but Take-Two is scheduled to host a conference call with investors this afternoon, and we may learn more then. We’ll update this story with anything Take-Two may share about the nature of the delay.

2K Games had claimed Evolve would be the “defining” Xbox One and PlayStation 4 game of 2014. The game won the top prize from the E3 2014 Game Critics Awards and was of numerous major releases scheduled for this October. However, a number of games have moved out of the month, including Middle-earth: Shadow of Mordor, which is now coming in September.

Evolve is planned for release on Xbox One, PlayStation 4, and PC; no last-gen versions have been announced to-date. A PC-only alpha test recently took place for the game. For more, check out our Next Big Game feature on Evolve.