Although Steam's epic summer sale hasn't kicked off yet (perhaps next Thursday?), there are still plenty of deals to be had with 75% or more off Left 4 Dead 2, Killing Floor, Gary's Mod, BioShock titles, Dead Island, the Total War franchise, Spec Ops: The Line, Sleeping Dogs, The Darkness 2 and plenty more, not least of which are Firaxis and Rockstar packs that offer three major titles from each developer for $20. Also of note, this week's Humble Weekly Sale offers savings on Toki Tori, Edge and Rush, while the latest Humble Bundle serves up six indie novels.
Steam
{pf id:2831 size:small} Left 4 Dead 2 $4.99 (75% off + free weekend)
{pf id:2763 size:small} Killing Floor $3.99 (80% off)
{pf id:38418 size:small} X3: Terran Conflict $7.99 (50% off)
Gary's Mod $2.49 (75% off)
75% off Sonic titles (free weekend for Sonic & All-Stars Racing Transformed)
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Amazon Digital
{pf id:86893 size:small} BioShock 1 + 2 $4.99 (88% off)
{pf id:54180 size:small} BioShock 1 + 2 + 3 $39.99 (60% off)
{pf id:37924 size:small} Civ IV, V + XCOM: Enemy Unknown $19.99 (83% off)
{pf id:86986 size:small} GTA IV + LA Noire + Max Payne 3 $19.99 (50% off)
{pf id:86986 size:small} GTA Complete Pack $19.99
{pf id:1316 size:small} Batman: Arkham Asylum + Arkham City $11.49 (77% off)
{pf id:89607 size:small} Scribblenauts Unlimited $7.49 (75% off)
{pf id:53083 size:small} Bastion $4.49 (70% off)
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GameStop
{pf id:40478 size:small} The Witcher 2: Assassins of Kings $7.99 (60% off)
{pf id:87572 size:small} SimCity $39.99 (33% off)
{pf id:87984 size:small} Defiance $39.99 (33% off)
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GamersGate
{pf id:2543 size:small} Hearts of Iron 3 Collection $4.99 (75% off)
{pf id:2543 size:small} Hearts of Iron Collection $24.99 (75% off)
{pf id:80319 size:small} Dead Island: GotY $4.99 (75% off)
{pf id:89409 size:small} Dead Island: Riptide $19.98 (50% off)
{pf id:40512 size:small} Total War Master Collection $25.00 (75% off)
{pf id:3729 size:small} Saints Row 2 $3.74 (75% off)
Adventure Four Pack $9.99 (75% off)
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GameFly
{pf id:4195 size:small} TES V: Skyrim Legendary Edition $39.99 (33% off)
{pf id:36928 size:small} Fallout: New Vegas $4.99 (50% off)
{pf id:90402 size:small} Strike Suit Infinity $3.49 (50% off)
Galaxy on Fire 2 Full HD $4.99 (75% off)
Rising Storm $9.99 (50% off)
Kung Fu Strike: The Warrior's Rise $2.49 (75% off)
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Green Man Gaming
{pf id:85769 size:small} Spec Ops: The Line $7.49 (75% off)
{pf id:86115 size:small} Sleeping Dogs Pack $16.23 (75% off)
{pf id:2914 size:small} Lost Planet 2 $7.49 (75% off)
{pf id:86958 size:small} F.E.A.R. Pack $13.74 (75% off)
{pf id:81561 size:small} Stronghold 3 $7.49 (75% off)
Eve: Asteroid Miner Starter Pack $3.99 (80% off)
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Games for Windows
{pf id:83503 size:small} The Darkness II $7.49 (75% off)
{pf id:2463 size:small} Grotesque Tactics Bundle $15.99 (47% off)
{pf id:89067 size:small} Painkiller Hell & Damnation Collector's Edition $7.49 (75% off)
{pf id:86943 size:small} Duke Nukem Forever $4.99 (75% off)
{pf id:86589 size:small} Far Cry 3 $34.99 (30% off)
{pf id:86961 size:small} Far Cry 2 $2.49 (75% off)
Far Cry $2.49 (75% off)
Civilization III Complete Edition $2.49 (50% off)
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GOG
60% off "amazing stories"