Here are some of the budget priced laptop for and under 30K price range.
Lenovo 100-15IBD : 100-15IBD model from Lenovo has 15.6-inch display screen with black sturdy design. It has Intel Core 5005U i3 processor with 4GB RAM. The machine's performance is really good for casual gaming and minimal multi media tasks. It has Intel integrated graphics however don't expect console level performance. Though if you're into serious gaming that requires heavy graphic usage, then you have to get the budget beyond 40K for additional specs in the model. It also has 500 GB hard disk which is good for normal computing. It has freeDOS pre-loaded and you can upgrade to Windows 10 Professional version if you want.
It costs 25,999 Rs for this model on Amazon.
Dell Inspiron 3543: This model from Dell Inspiron 3543 has 15.6-inch plastic body. The processor for the laptop is Core i3-5005U 2nd generation. It has 4GB RAM with integrated graphics from Intel. Though it may not be high level gaming laptop but under 30k it has good performance that suits your need for casual gaming and movie watching. All in all, a good general purpose laptop. It has DOS pre installed on it so you have to upgrade to Windows 10 or Linux.
Cost : 26,999 Rs at Amazon and 27340 on Snapdeal.
Acer Aspire E5-573 : E5-573 model from ACER has 15.6 inches display screen with grey body. It has Core i3 Intel processor with 4GB RAM. The machine has 500 GB of disk space. By default the system has Windows 8.1 pre insalled. However the machine does qualify for the Windows 10 upgrade. So you can get that during the purchase as well. It has integrated graphics in it so the machine is good enough for the casual gaming and multimedia usage.
Cost : 27,999 Rs on Amazon.
HP 15-AC042TU : This model from HP has 15.6-inch LED display curvy semi-grey thin finish body. It has 1.7GHz Intel core i3 4005U processor with 4GB RAM. It has intel HD graphics and can be suitable for medium level of gaming. The device by default has the DOS installed on it. So if you want you can upgrade to the Windows 10 on it. The HD capacity of 1TB makes it a good laptop for those who wish to have a lot of storage on it. The reviews for this laptop are very good goes to show that it is very well designed general purpose laptop.
Cost: 29,360 Rs on Amazon.
Asus X554LA-XX371H Acer has recently put some of the good laptop models in the market. This model from Acer has some good reviews and appears in most of the recommendation engines. It has 15.6-inch LED display with black metallic finish body. The processor is 2nd generation Intel Core i3 4030U with 4GB RAM. The HDD of 500 GB is more than enough for Windows 8.1 OS. However it's better to upgrade to Windows 10 during the purchase time. Based on the specification, I can say it's good enough for casual gaming and movies.
Cost : 28,800 Rs on Amazon and Snapdeal.
Lenovo 59-442243 : For budget upto 30K, the lenovo's laptop offer very quality laptop. This is one is one of the good models with positive reviews. It has 15.6-inch LED display with black plastic finish body. Having Intel 2nd generation Core i3 4030U with 4GB RAM, the machine sure has a good performance. It has total 1TB of HD space with DOS installed on it. They do offer upgrade to windows in any service center. For casual gaming and general purpose use, the machine is really a good choice for you.
Cost : 29852 Rs -30100 Rs on Amazon.
There are few other models that you can check out on Amazon and Snapdeal.