Steam does not have region pricing for India. Origin has region pricing.
Also some sites like game4u.com gives you keys at local pricing.
You will have to wait for the retail version to come in stock or get the digital version if you are impatient
Some games like Divinity, Limbo, etc can only be downloaded , no retail version is available and will never have region pricing for India unless Steam introduces region pricing for India
All games are available in India. AFAIK only Dragon Age Inquisition and Fallout 3 is not available for purchase