Along with taking 75% off the Batman franchise, Steam is running a Square Enix promotion that includes a Hitman bundle with Absolution) for $11. Meanwhile, Amazon offers all three BioShocks for $12 (or just Infinite for $10), GamersGate has a Tom Clancy pack with End War, Rainbow Six Vegas, Chaos Theory and more, GameFly cuts 75% off Valve and Warhammer titles, and Green Man Gaming has deals on Bethesda releases.

Steam
73 Batman: Arkham Origins $10.00 (75% off)
90 Batman: Arkham City GotY $7.49 (75% off)
82 Just Cause 2 $3.74 (75% off)
87 Deus Ex: Human Revolution $4.99 (75% off)
85 Crusader Kings II Collection $19.99 (75% off)
68 Dungeon Siege Complete $7.99 (60% off)
79 Hitman Collection $11.24 (75% off)
82 Lego Batman 2 $4.99 (75% off)
75 Supreme Commander 2 $5.19 (60% off)
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Amazon Digital
92 BioShock Triple Pack $11.99 (85% off)
92  BioShock Infinite $9.99 (67% off)
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GamersGate
78 Darksiders II $7.50 (75% off)
75 Ghost Recon: Future Soldier $2.50 (75% off)
83 Splinter Cell: Blacklist $13.60 (66% off)
75 Tom Clancy's Collection $6.25 (75% off)
I Am Alive $3.74 (75% off)
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GameStop
84 Final Fantasy XIV: A Realm Reborn $14.99 (50% off)
87 Assassin's Creed III $19.99 (33% off)
43 Star Trek $14.99 (50% off)
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GameFly
88 Half-Life Complete $9.99 (75% off)
88 Left 4 Dead 2 $4.99 (75% off)
95 Portal 2 $4.99 (75% off)
75 Warhammer 40k: Space Marine $7.49 (75% off)
86 Warhammer 40k: Dawn of War II $4.99 (75% off)
20% off select titles via "MAR20OFF"
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Green Man Gaming
93 TES V: Skyrim Legendary Edition $23.99 (40% off)
91 Dishonored GotY $17.99 (40% off)
88 Fallout 3 GotY $9.89 (67% off)
93 TES IV: Oblivion GotY $6.59 (67% off)
20% off select titles via "PLOCVS-G2T5YX-DATY6M"
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Get Games
88 Borderlands 2 GotY $9.99 (75% off)
Dreamcast Collection $7.49 (75% off)
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GOG
50% off Interplay titles