Besides the typical array of digital deals -- which includes a bundle with Mark of the Ninja and four other titles at Amazon for $10 -- it's worth mentioning that Indie Royale has launched its latest indie pack with five titles including Unmechanical and Krater for about $5, while a new promotion focusing on Steam's Greenlight program is offering a healthy variety of nine upcoming games for $5.

Steam
86 Legend of Grimrock $5.09 (66% off)
71 Painkiller Complete Pack $16.99 (66% off)
80  AI War: Fleet Command $2.49 (75% off)
73  Prototype 2 $15.99 (60% off -- today only)
Antichamber $14.99 (25% off)
Hacker Evolution Duality $14.99 (25% off)
Lucid $1.25 (75% off)
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Amazon Digital
90 Five Arcade/Indie Titles $9.99 (86% off)
85 Crusader Kings Pack $9.99 (92% off)
76 Fable Bundle $9.99 (83% off)
92 The Walking Dead $12.49 (50% off)
79 Tera Online $9.99 (50% off)
84 Age of Empires III Complete Collection $9.99 (75% off)
73 Paradox 2012 Ultimate Pack $14.99 (93% off)
80 Settlers Bundle $15.99 (81% off)
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GameStop
91 Dishonored $29.99 (50% off)
72 Blood Bowl Legendary Edition $4.99 (75% off)
Hotline Miami $9.99 (50% off)
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GamersGate
90 Company of Heroes Complete $8.74 (75% off)
82  Darksiders $5.00 (75% off)
78 Darksiders II $14.99 (70% off)
86 Frozen Synapse $7.80 (66% off)
88 Crysis Collection $13.98 (80% off)
Divinity Anthology $20.07 (33% off)
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GameFly
81 Assassin's Creed Director's Cut $4.99 (75% off)
89 Assassin's Creed II $4.99 (75% off)
88 Assassin's Creed Brotherhood $4.99 (75% off)
79 Assassin's Creed Revelations $10.20 (66% off)
87 Assassin's Creed III $39.99 (20% off)
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Green Man Gaming
80 Sleeping Dogs $12.49 (75% off -- more Square Enix deals)
81  Swords & Soldiers $2.49 (75% off)
73 Sanctum $2.48 (75% off)
61 Alien Breed Trilogy $5.73 (75% off)
69  Q.U.B.E. $3.74 (75% off)
83 Worms Reloaded GotY $6.24 (75% off)
Worms Ultimate Mayhem $3.74 (75% off)
Worms Crazy Golf $2.49 (75% off)
Awesomenauts $4.99 (50% off)
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Get Games
88 Total War Grand Master Collection $56.09 (66% off)
67 Sega Sci-Fi Pack $18.74 (75% off)
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GOG
60% off Strategy First titles