Publisher Grey Box announces Grey Goo is now available on Steam for Windows PCs, offering the latest real-time strategy game from genre veterans Petroglyph. Word is: "Those that purchase the game this weekend will receive a limited edition soundtrack from legendary videogame composer Frank Klepacki." Here's a recent launch trailer along with more on the game and its pedigree:

Grey Box partnered with acclaimed design studio Weta Workshop, best known for their work on The Lord of the Rings film trilogy, to help create and define a fantastic yet fully realized universe for Grey Goo’s story to breathe in. Three unique factions bring the game’s sci-fi setting to life: the resourceful Beta, the technologically advanced Humans and the all-consuming and destructive Goo. Each race offers distinctive army, base and upgrade dynamics, giving players the tools to devise and experiment with a variety of asymmetric play styles and strategies for all-out warfare.

Grey Goo combines the best elements of traditional RTS gameplay with modern design standards, emphasizing base-building, unit management and tactical choices with a focus on intelligent action and tension over tedium and frustration. Experience the rise of the Goo as it unfolds from each faction’s perspective in Grey Goo’s single-player campaign. Multiplayer allows up to four players to compete locally (LAN) or online, with custom settings available to tailor matches as desired. Grey Goo also includes a map editor, featuring the same robust tool kit used by Petroglyph to build all the maps for the game.