GamersGate's month-long summer sale is coming to a close with daily discounts of at least 75% off on F.E.A.R. 3 and S.T.A.L.K.E.R. Shadow of Chernobyl along with a slew of other deals. Meanwhile, Steam offers savings on Just Cause titles and Ghost Recon: Future Soldier, Amazon has cut prices on Serious Sam and Civilization titles, GameStop provides 75% off Shogun 2 and Saints Row: The Third as well as 40-50% off The Secret World and The Walking Dead, GameFly knocks 75% off GTA games and GetGames has a random assortment of bargains.

Steam
82 Just Cause 2 $3.74 (75% off)
75 Ghost Recon: Future Soldier $33.49 (33% off)
70 Age of Empires Online DLC: Steam Starter Pack $9.99 (50% off)
70 Age of Empires Online DLC: Celebration Bundle $2.49 (50% off)
Day of Defeat: Source $3.39 (66% off -- today only)
Just Cause $2.49 (75% off)
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Amazon Digital
87 Civilization V: GotY $12.49 (75% off)
71  Mount & Blade $4.88 (67% off)
75 Serious Sam 3: BFE $9.99 (75% off)
75  Serious Sam Double D $1.99 (75% off)
70 Serious Sam HD: The First Encounter $3.74 (75% off)
74 Serious Sam HD: The Second Encounter $4.99 (75% off)
63 Serious Sam: The Random Encounter $1.24 (75% off)
Serious Sam 2 $2.49 (75% off)
Inversion $9.98 (75% off)
Civilization IV: The Complete Edition $7.49 (75% off)
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GameStop
88 Shogun 2: Total War $7.49 (75% off)
88 Empire: Total War $7.99 (60% off)
83 Saints Row: The Third $12.49 (75% off)
77 The Secret World $24.99 (50% off)
81 The Walking Dead $14.99 (40% off)
44 Stronghold 3 $19.99 (50% off)
Company of Heroes: Gold Edition $7.49 (75% off)
Supreme Commander $9.99 (50% off)
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GamersGate
72 F.E.A.R. 3 $4.99 (75% off)
82 Lara Croft and the Guardian of Light $5.98 (60% off)
83 Sonic Generations $10.18 (80% off)
60 Front Mission Evolved $5.20 (60% off)
76  Prince of Persia: The Forgotten Sands $3.38 (66% off)
S.T.A.L.K.E.R. Shadow of Chernobyl $3.99 (80% off)
Metal Brigade Tactics $4.00 (60% off)
DeadEnd Cerebral Vortex $1.74 (75% off)
SimCity 4 Deluxe Edition $9.98 (50% off)
Doom 3 $4.98 (50% off)
Precursors $7.98 (50% off)
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GameFly
74 LEGO Harry Potter: Years 1-4 $5.00 (75% off)
73 Sanctum $5.00 (66% off)
Battlefield 2 Complete Collection $5.00 (75% off)
Jade Empire Special Edition $5.00 (66% off)
GTA IV $4.99 (75% off)
GTA: San Andreas $3.75 (75% off)
GTA: Vice City $2.49 (75% off)
GTA III $2.49 (75% off)
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GetGames
89 Anno 1404 $4.99 (75% off)
83 Anno 2070 $15.99 (60% off)
78 Driver San Francisco $7.49 (75% off)
77 From Dust $3.74 (75% off)
88 Rayman Origins $14.99 (50% off)
80 Settlers 7 Paths to a Kingdom $7.49 (75% off)
Far Cry Bundle $6.25 (75% off)
More..

Green Man Gaming
20% off any title via code "DERHE-RRDER-RINGE"

GOG
50% off Ultima titles