Today's daily deals in the Steam Holiday Sale of 2010 bring some huge discounts to a good set of games. Immediate standouts are Burnout Paradise, The Witcher, and BioShock 2. These deals will last until tomorrow morning at 10AM PST, when we'll get a new set of discounts. Your deals for 12/21 are:

• The Polynomial - $2.50 (75% off)
• Gothic Bundle (Gothic 1, Gothic 2: Gold Edition, Gothic 3, Arcania: Gothic 4) - $34.99 (50% off)
• Aion: Assault on Balaurea - $10 (75% off)
• The Witcher: Enhanced Edition - $5.00 (75% off)
• Men of War: Gold Edition - $8.75 (75% off)
• Defense Grid: The Awakening - $2.00 (80% off)
• Burnout Paradise: The Ultimate Box - $5.00 (75% off)
• Lara Croft and the Guardian of Light - $5.10 (66% off) - or $3.60 (76% off) if you own any Tomb Raider game
• Disciples III: Renaissance - $7.50 (75% off)
• Resident Evil 5 - $10.20 (66% off)
• Puzzle Quest: Challenge of the Warlords - $1.50 (85% off)
• BioShock 2 - $9.99 (50% off)
• Indie Deal - Iron Grip: Warlord - $2.50 (75% off)