Steam now offers a selection of Prima strategy guides that can be read from within games using the Steam overlay (the guides are also available out of game). The six guides available at this time are for Dragon Age: Origins, Battlefield: Bad Company 2, Splinter Cell: Conviction, Left 4 Dead 2, Just Cause 2, and Dragon Age: Origins - Awakening. For a limited time these guides are being offered for 50% off their regular prices.