Steam's gamepad-themed Big Picture launch sale continues this weekend with a few dozen controller-ready titles discounted, including some that have been added since earlier this week: Borderlands 2, Trine 2 and the Serious Sam franchise. Meanwhile, Amazon offers 10 games in a Total War pack for $23.75, GameStop has Hitman: Absolution for $29.99 and GamersGate's holiday promo is still happening with savings on hundreds of titles. Also of note, the Humble Bundle has made its THQ event even sweeter by adding Titan Quest and Red Faction: Armageddon DLC.

Steam
87  Borderlands 2 $44.99 (25% off)
75  Serious Sam 3: BFE $9.99 (75% off)
85  Trine 2 $3.75 (75% off)
73  Serious Sam HD: Gold Edition $9.99 (75% off)
85  Counter-Strike: Global Offensive $7.49 (50% off)
88  Left 4 Dead $4.99 (75% off)
88  Left 4 Dead 2 $4.99 (75% off)
95  Portal 2 $4.99 (75% off)
75  Warhammer 40,000 Space Marine $7.49 (75% off)
83  Sonic Generations $7.49 (75% off)
83  Alan Wake Franchise $10.00 (75% off)
81  Orcs Must Die! 2 $3.74 (75% off)
90  Limbo $2.49 (75% off)
88  Braid $2.50 (75% off)
83  AudioSurf $2.50 (75% off)
84  The Secret of Monkey Island: Special Edition $2.49 (75% off)
75  Magicka Collection $8.74 (75% off)
70  Shank $3.39 (66% off)
74  Shank 2 $3.39 (66% off)
77  Lead and Gold: Gangs of the Wild West $2.49 (75% off)
50  Post Apocalyptic Mayhem $2.49 (75% off)
82  Lego Batman 2: DC Super Heroes $10.19 (66% off)
74  Lego Harry Potter: Years 1-4 $6.79 (66% off)
76  Lego Harry Potter: Years 5-7 $6.79 (66% off)
Lego Star Wars: The Complete Saga $9.99 (50% off)
Hell Yeah! Wrath of the Dead Rabbit $3.74 (75% off)
Sine Mora $3.39 (66% off)
Castle Crashers $5.09 (66% off)
Tiny and Big: Grandpa's Leftovers $2.49 (75% off)
Mark of the Ninja $10.04 (33% off)
Geometry Wars: Retro Evolved $1.00 (75% off)
Wanderlust: Rebirth $3.39 (66% off)
Intrusion 2 $3.39 (66% off)
Deadlight $10.04 (33% off)
Rocketbirds: Hardboiled Chicken $4.99 (50% off)
Wizorb $0.74 (75% off)
A Virus Named TOM $2.49 (75% off) 
They Bleed Pixels $3.39 (66% off)
Bit.Trip Runner $3.33 (67% off)
FTL: Faster Than Light $5.99 (40% off)
Hotline Miami $4.99 (50% off)
Check vs Mate $4.99 (75% off)
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Amazon Digital
88  Total War Bundle + Viking + TW Battles $23.75 (84% off)
73  Port Royale 3 $13.59 (66% off)
Sega Genesis Classic Game Pack $4.99 (87% off)
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GameStop
79 Hitman: Absolution $29.99 (40% off)
88 Half-Life 2: The Orange Box $9.99 (50% off)
Day of Defeat: Source $4.99 (50% off)
Counter-Strike Complete $14.99 (50% off)
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GamersGate
73  Cities in Motion Complete Collection $24.99 (50% off)
82  Just Cause Collection $20.00 (50% off)
66  King Arthur Complete Collection $15.00 (50% off)
71  Mount & Blade Collection $27.48 (50% off)
78  Victoria Collection $19.98 (50% off)
88  Super Street Fighter IV Arcade Edition $19.98 (50% off)
88  Rayman Origins $14.98 (50% off)
Ravaged $2.49 (75% off  -- today only)
Ghost Recon: Advanced Warfighter 2 $2.50 (75% off -- today only)
The Guild Complete Collection $15.00 (50% off)
Shoot Many Robots Four Pack $10.18 (66% off)
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GameFly
58 X-Blades $0.99 (90% off)
75 Two Worlds II $7.49 (75% off)
82 Two Worlds II: Pirates of the Flying Fortress $4.99 (75% off)
80 Risen $4.99 (75% off)
72 S.T.A.L.K.E.R.: Clear Sky $2.49 (75% off)
Nail'd $1.25 (75% off)
Transcripted $0.99 (90% off)
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Green Man Gaming
89 Bastion $4.49 (70% off)
90 Batman: Arkham Asylum GotY $4.98 (75% off)
70  NecroVision $6.79 (66% off)
King's Bounty: Warriors of the North $14.99 (50% off)
Miner Wars 2081 $4.99 (80% off)
Tiny Troopers $4.99 (50% off)
Red Orchestra $4.99 (50% off)
Colorpus $4.99 (50% off)
Mortal Kombat Arcade Kollection $2.99 (70% off)
25% off via code "GMG25-CZPYL-D5MQ6"
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Get Games
67 Aliens vs. Predator $3.74 (75% off)
83 Anno 2070 Deluxe $21.99 (60% off)
86 BioShock 2 $4.99 (75% off)
87  Deus Ex: Human Revolution $7.49 (75% off)
Deus Ex GotY $1.99 (75% off)
Deus Ex: Invisible War $2.49 (75% off)
Duke Nukem Forever $4.99 (75% off)
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GOG
60% off Myst titles