Thunder Wolves is now available for preorder on Steam, where a 20% discount is to be had for buying the Windows edition of the helicopter action game in advance of its release next week. Word is: "Gratuitous explosions, overzealous rookies, endless ammunition - Thunder Wolves is a love letter to the macho, over-the-top action flicks of a bygone era. Plus, when was the last time you played a helicopter-shooter that wasn't a retro-remake? Even better, this one has local co-op." Here's a new gameplay trailer.