If you didn't grab the Elder Scrolls bundle from GameStop last week, Steam offers 33% off Skyrim along with 66% off both Portal games and the Tropico franchise, as well as 80% off Company of Heroes Complete Pack (the sequel was announced this month, due in 2013). Meanwhile, there's a smattering of discounts from other digital players, including a $10 Double Fine bundle at Amazon, Arkham City for $11.98 at GamersGate, and Splinter Cell Conviction for $4.99 at GameStop.

Steam
93 The Elder Scrolls V: Skyrim $40.19 (33% off)
95 Portal 2 $6.79 (66% off)
95 Portal Bundle $8.49 (66% off)
72 Company of Heroes Complete Pack $9.99 (80% off)
81 Tropico Trilogy $6.79 (66% off)
78 Tropico 4 $13.59 (66% off)
Mutant Storm: Reloaded $2.49 (50% off -- today only)
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Amazon Digital
81  Call of Duty: Modern Warfare 3 $39.99 (33% off)
68  Dungeon Siege 3 $14.95 (25% off)
75  Supreme Commander 2 $6.10 (59% off)
86 The Sims 3 $19.99 (33% off)
Rollercoaster Tycoon 3: Platinum $4.99 (83% off)
Psychonauts $3.99 (60% off)
Costume Quest $2.99 (80% off)
Stacking $7.49 (50% off)
Oh So Fine Bundle $9.99 (75% off)
Final Fantasy XIV $9.99 (50% off)
SimCity 4 Deluxe Edition $14.80 (26% off)
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GameStop
79 The Lord of the Rings Online: Mithril Edition $14.99 (50% off)
87 Civilization V $14.99 (50% off)
90 Batman: Arkham Asylum GotY $4.99 (50% off)
90 Batman: Arkham City $14.99 (50% off)
75 Magicka $4.99 (75% off)
70 Lord of the Rings: War in the North $9.99 (50% off)
87 Deus Ex: Human Revolution $9.99 (50% off)
81 Splinter Cell Conviction $4.99 (75% off)
67 Aliens vs. Predator $4.99 (75% off)
82 Call of Duty: Black Ops $26.79 (33% off)
62 Gotham City: Imposters $7.49 (50% off)
77 From Dust $7.49 (50% off)
83 Borderlands $9.99 (50% off)
90  FIFA Soccer 12 $19.99 (50% off)
Tiger Woods PGA Tour 12 The Masters $19.99 (50% off)
Universe at War: Earth Assault $4.99 (75% off)
Age of Empires III: Complete Collection $19.99 (50% off)
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GamersGate
90 Batman: Arkham Asylum GotY $4.99 (75% off)
90 Batman: Arkham City $11.98 (60% off)
67 Oil Rush $10.00 (50% off)
70 NecroVision Hardcore Edition $6.24 (75% off)
69 East India Company Collection $5.08 (66% off)
84 Lego Batman: The Videogame $6.78 (66% off)
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Green Man Gaming
Disciples III: Resurrection $19.95 (33% off)
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GameFly
75  Magicka Collection $6.25 (75% off)

Games for Windows
83 Borderlands $9.99 (50% off)

GOG
50% off 1C classics