Seasonal sales are underway at digital distributors with hundreds of titles under $5 at Amazon and new daily deals at GameFly, including half off Thief as well as Fallout 3 and New Vegas for $5 apiece today. Meanwhile, Steam has free weekend access and 67% off Payday 2, the Mass Effect trilogy and Skyrim are $10 each at GameStop, which also has Far Cry 3 for $7.49 and Max Payne 3 for $4.99. Also of note, EA is now offering Battlefield 3 for free on Origin (PvZ is still up for grabs too), while the latest Humble Bundle offers Android and PC-compatible titles.

Steam
77 Payday 2 $9.99 (67% off + free weekend)
81  Europa Universalis III Collection $9.99 (75% off)
85 Europa Universalis IV $9.99 (75% off)
78  Victoria II $6.79 (66% off)
85 Euro Truck Simulator 2 Collector's Bundle $19.99 (50% off)
79 Mirror's Edge $4.99 (75% off)
89 Dead Space Pack $8.74 (75% off)
75 Two Worlds II $4.99 (75% off)
66 Primal Carnage $3.74 (75% off)
Guncraft $3.74 (75% off)
Franchise Hockey Manager 2014 $19.99 (50% off)
Dracula 2: The Last Sanctuary $4.99 (50% off)
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Amazon Digital
82 Mortal Kombat Komplete Edition $5.00 (75% off)
88 XCOM: Enemy Within $9.89 (67% off)
75 Tropico Bundle (all five games) $44.99 (44% off)
87 Assassin's Creed III $7.50 (62% off)
85 Need for Speed Most Wanted $4.99 (75% off)
73 Focus RPG Bundle $10.00 (80% off)
88 Grand Theft Auto IV Complete $7.50 (50% off)
70 Thief $24.99 (50% off)
79 Transformers: War for Cybertron $5.00 (75% off)
78 Transformers: Fall of Cybertron $15.00 (75% off)
Tony Hawk's Pro Skater HD $2.50 (75% off)
The Elder Scrolls Online Imperial Edition $53.58 (33% off)
Injustice: Gods Among Us Ultimate $7.50 (75% off)
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GameStop
93 Mass Effect Trilogy $9.89 (67% off)
93  The Elder Scrolls V: Skyrim $9.99 (50% off)
84  Max Payne 3 $4.99 (75% off)
88  Far Cry 3 $7.49 (75% off)
87 Sid Meier's Civilization V $7.49 (75% off)
62 TMNT: Out of the Shadows $3.74 (75% off)
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GamersGate
57 Ravaged Zombie Apocalypse $1.99 (80% off)
82  Beatbuddy: Tale of the Guardians $3.00 (80% off)
Sword of the Stars: The Pit $2.00 (80% off)
Guncraft $3.00 (80% off)
Orc Attack: Flatulent Rebellion $2.00 (80% off)
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GameFly
84 Fallout: New Vegas $4.99 (50% off)
88 Fallout 3 $4.99 (50% off)
80 Dungeons & Dragons: Chronicles of Mystara $7.49 (50% off)
69 Remember Me $14.99 (50% off)
76 Rage $9.99 (50% off)
Return to Castle Wolfenstein $4.99 (50% off)
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Green Man Gaming
60 Resident Evil 6 $13.59 (66% off)
77 Lead and Gold $2.49 (75% off)
Nosgoth Veteran $6.99 (65% off)
20% off via "ZMMIEX-EW1476-0PNL11"
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Get Games
82 Hotline Miami $2.47 (75% off)
73 Shadow Warrior Special Edition $12.49 (75% off)
66 Defense Technica $2.24 (85% off)
Foul Play $3.74 (75% off)
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Origin
88  Battlefield 3 & Plants vs. Zombies GotY $0.00 (free...)

GOG
Up to 70% off "three dollar treasures"