Defense Grid: The Awakening $2.49, Direct2Drive, Steamworks By w00py | September 16, 2011 0 Comment Defense Grid: The Awakening is on sale for $2.49 after promotion code at Direct2Drive. This is a US only deal. The game uses Steamworks so you’ll have to activate it on Steam. The promotion code is: CAGDGRID75 The game has an 81/100 metascore. A demo is available on Steam. Direct2Drive US Link.