Valve has finally launched their Steam Summer Sale, where deals change each and every day. Today you can grab games like Terraria cheap, with 75-percent off, down from $9.99 to $2.49. Call of Duty: Modern Warfare 3 is down from $99.99 to $49.99, a respectable 50-percent off.

Portal 2 has 75-percent slashed off, bringing it down to $4.99 from its original $19.99 price. There are also some Pack Deals, with the id collection, Pop Cap collection, and the Star Wars collection all 50-percent off, and all $49.99 from their original $99.99 pricing.

Rockstar's collection has 48-percent off, down to $79.99, THQ collection is down a whopping 81-percent from $394.81 to just $74.99, and there's plenty, plenty more. Get in on the Steam Summer Sale!