GamersGate continues its summer sale this week with major discounts on Paradox Interactive titles, including 65% off the Magicka Collection (includes the base game and eight DLC packs), while Direct2Drive is taking its summer promo out with a bang, knocking 75% off Just Cause 2, two S.T.A.L.K.E.R. titles, Alpha Protocol and The Witcher. You'll also find 50% to 75% off Bulletstorm, Dragon Age: Origins, Battlefield 2: Complete, Mirror's Edge, and Command & Conquer 3. Meanwhile, folks with no cash to spare can slaughter some Nazi dinosaurs courtesy of Steam's free-to-play weekend of Dino D-Day.

Steam
Dino D-Day $4.99 (50% off -- free to play through Sunday)
Vampire: The Masquerade - Bloodlines $4.99 (75% off)
Digital Combat Simulator: Black Shark $26.66 (33% off)
The Kings' Crusade: New Allies $2.49 (50% off)
Gods and Heroes: Rome Rising $14.99 (50% off)
Capsized $3.39 (66% off)
DCS A-10C Warthog $40.00 (33% off)

Impulse
Bulletstorm $14.99 (50% off)
Blood Bowl: Dark Elves Edition $4.99 (75% off)
Pe-2: Diver Bomb $11.97 (40% off)
Greed - Black Border $6.24 (75% off)
Trapped Dead $9.99 (50% off)
66% off Dawn of Magic 2 and Time of Shadows
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GamersGate
Magicka Collection $8.73 (65% off)
Victoria II $14.98 (50% off)
Mount & Blade $9.98 (50% off)
Hearts of Iron III $9.98 (50% off)
Europa Universalis III $4.98 (50% off)
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Direct2Drive
Alpha Protocol $4.95 (75% off)
Just Cause $3.75 (75% off)
Just Cause 2 $4.95 (75% off)
S.T.A.L.K.E.R.: Clear Sky $4.95 (75% off)
S.T.A.L.K.E.R.: Shadow of Chernobyl $4.95 (75% off)
The Witcher: Enhanced Edition $4.95 (75% off)

Games for Windows
Dragon Age: Origins $14.99 (50% off)

Origin
Mercenaries 2: World in Flames $4.99 (50% off)
Need for Speed: Undercover $4.99 (50% off)
Burnout: Paradise Ultimate $4.99 (75% off)
Command & Conquer: Red Alert 3 $4.99 (50% off)
Mirror's Edge $4.99 (75% off)
Battlefield: Bad Company 2: Vietnam $4.99 (66% off)
Battlefield 2: Complete Collection $4.99 (75% off)
Medal of Honor: Airborne $4.99 (50% off)
Battlefield 2142 Deluxe $4.99 (66% off)
Spore $4.99 (75% off)

Good Old Games
50% off TopWare Interactive titles