The Hawken Team posted to the game’s official Facebook and Steam pages on October 2nd to announce the end of service for the PC version of the game. The full statement reads:

Pilots,
It’s been an incredible journey since the introduction of Hawken on Steam, back in 2014. The game’s success has been largely due to your continuous support. The Hawken community has been the cornerstone of this ever-evolving franchise.

After 3 great years, we are shutting down the PC Steam servers to refocus our development efforts. The PC game will officially be removed on January 2, 2018, and all DLC and purchasable content will also be unavailable starting today.

It’s been an incredibly rewarding experience working alongside such a dedicated PC player base. Your feedback and support has been invaluable to us, and the team looks forward to creating more great games based on what we’ve learned from you.

Thank you all very much for your support!
The Hawken Team

No further information has been issued regarding the Xbox One and PlayStation 4 versions of the game but as of October 3rd, 2017 the game and its paid content remains available on both platforms. The reason is likely due to the game’s continued low player count. According to chart data from SteamDB there have been just over 100 daily players in the game since the beginning of 2017.