I was browsing for new movies yesterday in a store and came across the Portal 2 PC/Mac game which sells for Rs. 699 in the store. The game costs $50 on Steam and $30 at Amazon . Flipkart sells it for Rs 622( ~$13 ).
Though eventually Steam could get the pricing down to $10, its a good grab if you do not want to carry CDs around since Steam manages your games and progress on the cloud.
If you are India, you could buy from flipkart for the best price.
Sairam's Blog 