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GamersGate / GamersGate UK has a few deals live at their site.
Sonic Midweek Deal
Sonic Adventure 2 $2.50 (Steam)
Sonic & All-Stars Racing Transformed $5 (Steam)
Sonic Generations $7.50 (Steam)
Sonic CD $1.25 (Steam)
Sonic Adventure DX $2
Sonic The Hedgehog 4 Episode 1 $2.50 (Steam)
Sonic The Hedgehog 4 Episode II $3.75 (Steam)
Sonic & SEGA All-Stars Racing $2.50
Sonic the Hedgehog $1.25
Plus more deals…
NBA 2K15 $15 (Steam)
Aspyr Week Deal
Sid Meier’s Civilization V: The Complete Edition $12.50 (Steam)
Sid Meier’s Civilization: Beyond Earth $16 (Steam)
Sid Meier’s Civilization V: Brave New World $7.50 (Steam)
Sid Meier’s Civilization V $7.50 (Steam)
Civilization IV $5 (Steam)
Civilization IV: Complete Edition $7.50 (Steam)
Plus more deals…