At GDC Crytek announced that it would launch its CryEngine as a subscription service this May -- and today, it has launched it exclusively via Valve's Steam platform. The cost is $9.90 a month, with discounts of up to 16 percent available if you subscribe in advance for six months at a time. European subscribers will pay €9.90 a month. This price is a sharp contrast to Epic Games' Unreal Engine 4, which is $19 a month -- and also takes 5 percent revenue off the top for any revenue-generating projects. Epic has been very aggressive in supporting its engine, however, and completely opening up its development to the community via live source access, a step Crytek has not yet taken. To learn more about CryEngine, you can head to the company's FAQ; if you're interested in subscribing, you can do so via the engine's Steam page.