In anticipation of Red Faction: Armageddon's launch next Tuesday, Steam has cut 75% off existing Red Faction titles, pushing them below $5 each. If you've been itching to check out Black Ops, Steam also offers free access until 1PM PDT Sunday, alongside a 33% discount. Meanwhile, Impulse is selling Crysis 2 Limited Edition for $29.97, which includes bonus XP along with a special decoy, weapon skin and dog tag, GamersGate knocks 50% off a GTA bundle, Microsoft offers 50% off Batman: Arkham Asylum, and EA has reduced Dead Space 2 to $19.95.

Steam
Red Faction $2.49 (75% off)
Red Faction Guerrilla $4.99 (75% off)
Red Faction II $2.49 (75% off)
Call of Duty: Black Ops $40.19 (33% off)
ProtoGalaxy $3.40 (66% off)
Numen: Contest of Heroes $2.50 (75% off)
Still Life $7.99 (20% off)
Still Life 2 $7.99 (20% off)
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Impulse
Crysis 2 Limited Edition $29.97 (50% off)
Star Wolves 3: Civil War $10.49 (65% off)
Academagia: The Making of Mages $12.47 (50% off)
Dreamcatcher Sci-Fi Bundle $22.47 (50% off)
50% off all Haegemonia titles
50% off all Age of Wonders titles
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GamersGate
Grand Theft Auto: The Complete Package $24.98 (50% off)
King's Legacy $3.48 (50% off)
Tidalis $4.98 (50% off)
Frozen Synapse $19.95 (20% off)
50% off AI War titles
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Direct2Drive
15% off all DLC via coupon code "EXTRAS"
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Games for Windows
Batman: Arkham Asylum $14.99 (50% off)

Origin (EAStore)
Dead Space 2 $19.95 (33% off)
Dragon Age II $39.49 (34% off)
Crysis 2 $39.99 (33% off)

Good Old Games
50% off The Age of Wonders titles