Folks who aren't currently immersed in the realm of Skyrim might want to take advantage of some of this week's RPG discounts. TES IV: Oblivion is only $4.99 through Steam (today only, as part of Valve's daily deals), while Good Old Games offers The Witcher and its sequel for only $23.99. If you're strapped for cash, Killing Floor has free admission this weekend alongside a 75% discount. You'll also find significant savings on AvP, Shogun 2, Rage, BioShock 2 and others.

Steam
77 Killing Floor Bundle $7.98 (75% off)
81 Defense Grid: The Awakening and DLC $7.99 (50% off)
The Elder Scrolls IV: Oblivion GotY $4.99 (75% off)
More...

Impulse
88 Shogun 2: Total War $14.99 (50% off)
67  Aliens vs. Predator $6.79 (66% off)
74  Brink $14.99 (25% off)
64  Alpha Protocol $6.79 (66% off)
86  Crysis 2 $39.99 (33% off)
76  Rage $39.98 (33% off)
Rome: Total War Gold Edition $3.39 (66% off)
Medieval II Total War: Gold Pack $3.39 (66% off)
The Club $5.09 (75% off)
More...

GamersGate
79 R.U.S.E.: The Art of Deception $8.99 (70% off)
Air Conflicts - Secret Wars $12.48 (50% off)
90 Limbo $2.49 (75% off)
Europa Universalis III: Chronicles $7.49 (75% off)
77 Killing Floor $4.99 (75% off)
Atom Zombie Smasher $6.48 (50% off)
86 BioShock 2 $4.99 (75% off)
Alien vs Predators Classic 2000 $2.50 (50% off)
Red Faction $2.49 (75% off)
Lost Planet: Extreme Condition $5.99 (70% off)
More...

Direct2Drive
88 Call of Duty: Modern Warfare 2 $14.95 (50% off)
64 Pirates of Black Cove $4.95 (75% off)

Origin
69 Mercenaries 2: World in Flames $4.99 (50% off)
88  Battlefield 3 $49.99 (17% off)
Warhammer Online: Age of Reckoning $4.99 (66% off)
FIFA Manager 11 $9.99 (75% off)

Good Old Games
90 The Witcher: Enhanced Edition + The Witcher 2: Assassins of Kings $23.99 (52% off)