In coordination with the launch of Trine 2's first piece of DLC this week, Steam has steeply discounted the series with both titles and the new add-on collectively priced at only $8.74. Many of last week's bundle deals have carried over, with considerable savings on a Crysis collection, a BioShock and Spec Ops: The Line pack, as well as GTA IV/L.A. Noire and Max Payne 3 combos. You'll also find solid deals on Mass Effect 3, The Darkness II, Batman: AA, as well as various Assassin's Creed and Tom Clancy titles. Oh, and although it's not listed, a Guest poster has drawn our attention to G2Play, which offers a Dark Souls Steam key for only $22.86 (~42% off).

Steam
83 Crysis Collection $17.49 (75% off)
86 Crysis 2 Maximum Edition $9.99 (75% off)
85 Trine Complete Collection $8.74 (75% off) 
85 Trine 2 $3.74 (75% off)
85 Frozenbyte Collection $9.99 (75% off)
42 Ship Simulator Extremes $4.99 (75% off)
70  Age of Empires DLC: Steam Starter Pack $9.99 (50% off)
Blacklight: Retribution - Sniper Kit $7.49 (50% off)
War of the Immortals - Starter Pack $4.99 (67% off)
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Amazon Digital
87 Mass Effect 3 Digital Deluxe Version $19.99 (60% off)
86 BioShock 1 & 2 + Spec Ops: The Line $19.99 (78% off)
81 Kingdoms of Amalur: Reckoning $15.99 (60% off)
66 Disney Kids and Family Pack $8.99 (94% off)
89 Dead Space Dual Pack $7.99 (80% off)
84 GTA IV + Max Payne 3 $29.99 (67% off)
87  L.A. Noire Complete + Max Payne 3 $29.99 (67% off)
77 The Darkness II $9.99 (80% off)
83 Borderlands GotY $14.99 (50% off)
51 Final Fantasy XI: Ultimate Collection Abyssea Edition $9.99 (50% off)
71 Spore Ultimate Digital Collection $11.99 (60% off)
88 Call of Duty: Modern Warfare 2 $9.99 (50% off)
82  Call of Duty: Black Ops $19.99 (50% off)
77 Split Second $4.00 (80% off)
80 Divinity II: The Dragon Knight Saga $5.99 (85% off)
64 Binary Domain $10.00 (75% off)
50 The Stronghold Collection $9.99 (50% off)
X-COM: Collection $3.75 (75% off)
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GameStop
70 Homefront $13.39 (33% off)
69 Warhammer 40k Dawn of War Collection $16.99 (66% off)
74 Majesty 2 Collection $6.79 (66% off)
Company of Heroes: Gold Edition $20.09 (33% off)
Heroes of Might and Magic V $4.99 (50% off)
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GamersGate
89 Batman: Arkham Asylum GotY $4.99 (75% off)
76 Hearts of Iron 3 Collection $7.49 (75% off)
79 King Arthur Collection $7.49 (70% off)
The Kings' Crusade Collection $5.99 (70% off)
Stardrone $2.99 (85% off)
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GameFly
71 Tom Clancy's Rainbow Six Vegas 2 $2.49 (75% off)
81 Tom Clancy's Splinter Cell Conviction $4.99 (75% off)
77 From Dust $3.75 (75% off)
79  R.U.S.E. $4.99 (75% off)
89  Assassin's Creed II Deluxe Edition $4.99 (75% off)
88 Assassin's Creed Brotherhood $9.99 (50% off)
79  Assassin's Creed Revelations $14.99 (50% off)
81 Bulletstorm $5.00 (75% off)
44 Stronghold 3 Gold $19.99 (50% off)
Far Cry $2.49 (75% off)
Far Cry 2 Fortune's Edition $2.49 (75% off)
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Green Man Gaming
66  Alter Ego $3.99 (60% off)
69  Still Life 2 $7.99 (60% off)
Still Life $3.99 (60% off)
Air Conflicts: Secret Wars $7.99 (60% off)
Death Road $5.99 (60% off)
Post Mortem $3.99 (60% off)
Syberia $3.99 (60% off)
Syberia 2 $3.99 (60% off)
The Rockin' Dead $3.99 (60% off)
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GOG
50% off point-and-click titles