If you missed Steam's Christmas discount on Batman: Arkham City, GameStop is offering a similar deal at $24.99. The outfit is also serving up 40-50% off Crysis and Crysis 2, Borderlands, Deus Ex: Human Revolution, Dead Island, Far Cry as well as Metro 2033. The selection is fairly bleak elsewhere, though Steam has Dead Space and Dead Space 2 for $5 each, while GamersGate has Mass Effect and its sequel for $5 apiece.
Steam
{pf id:1848 size:small} Dead Space $5.00 (75% off)
{pf id:36702 size:small} Dead Space 2 $5.00 (75% off)
Nation Red $2.50 (75% off + Free Weekend)
Front Mission Evolved $10.19 (66% off)
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GameStop
{pf id:81334 size:small} Batman: Arkham City $24.99 (50% off)
{pf id:1452 size:small} Borderlands $9.99 (50% off)
{pf id:1764 size:small} Crysis 2 $19.99 (50% off)
{pf id:54185 size:small} Deus Ex: Human Revolution $29.99 (40% off)
{pf id:80319 size:small} Dead island $29.99 (40% off)
{pf id:54210 size:small} Tropico 4 $19.99 (50% off)
{pf id:3058 size:small} Metro 2033 $9.99 (50% off)
Crysis $9.99 (50% off)
Far Cry Bundle $14.99 (50% off)
Duke Nukem Forever $9.99 (50% off)
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GamersGate
{pf id:3004 size:small} Mass Effect $4.99 (75% off)
{pf id:3005 size:small} Mass Effect 2 $4.99 (75% off)
{pf id:3005 size:small} Mass Effect 2 Digital Deluxe Edition $7.49 (75% off)
Breaking The Rules - The Roman $2.89 (71% off)
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Direct2Drive
{pf id:53084 size:small} Call of Juarez: The Cartel $24.95 (50% off)
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https://www.techspot.com/news/47039-weekend-game-deals-50-off-arkham-city-crysis-2-metro-2033.html