From now until July 4th, Steam is holding a "Perils of Summer" Sale. The digital game distributor is trying to keep you indoors during these nice summer days by offering ridiculously cheap games.

Every day, a new set of 24-hour discounts will go live. Today, they're offering the following deals:

• Overlord Complete Pack - $4.50 (85% discount)
• Aion Standard Edition - $19.99 (50% discount)
• Colin McRae's DiRT 2 - $10 (75% discount)
• BioShock 2 - $14.99 (50% discount)
• Unreal Deal Pack - $13.60 (66% discount)
• Trine - $4 (80% discount)
• Killing Floor - $5 (75% discount)
• Counter-Strike: Source - $6.80 (66% discount)

There are also a number of deals that will be active until the 4th. For example, all Ubisoft titles are 33% off and all Atari games are 66% off.