CBSE 12th

Hello Arunachal,
Tamil Nadu state board is one of the most competitive exam where it is necessary to score a good cut off to get a seat into Anna University.
The difficulty is not that much as compared to any entrance exam as the question will be mostly revolving around those in the book exercises. So, you need to focus more on the concepts and the book exercises. It is also important to practice the problems especially in maths and also in physics and chemistry.
You may refer the previous year question papers which will be of immense help to you during the last days of preparation.
Don't stress too much. Just keep focusing on the concepts and problems in the book back.
All the best!

Courses and careers after class 12th Science, Biology Group:
#1 MBBS (Bachelor OF MEDICINE, Bachelor OF SURGERY)
#2 VETERINARY SCIENCES
#3 B.A.M.S. (Bachelor OF AYURVEDA, MEDICINE AND SURGERY)
#4 BDS (Bachelor OF DENTAL SURGERY)
#5 PHARMACY
# 6 PHARM D
#7 B SC
#8 Diploma COURSES
#9 MANAGEMENT COURSES
#10 BUMS (Bachelor OF UNANI MEDICINE AND SURGERY)
#11 BHMS (Bachelor OF HOMEOPATHIC MEDICINE AND SURGERY)
#12 INTEGRATED LAW COURSE
#13 Bachelor OF PHYSIOTHERAPY
#14 BASLP (Bachelor OF AUDIOLOGY SPEECH LANGUAGE PATHOLOGY)
#15 Bachelor OF OCCUPATIONAL THERAPY
#16 PARAMEDICAL COURSES
#17 OTHER DEGREE AND Diploma COURSES
Here are some more Degree and Diploma courses, which 12th Science (Biology Group) students may pursue after completing board examination-
BA
B Social Work
Mass Communication and Journalism
Animation and Multimedia
Performing Arts
Language Courses (Foreign Languages are promising)
Diploma in Retail Management
Diploma in Education Technology
Nutrition and Dietetics
Diploma in Hotel Management
Air Hostess/Cabin Crew training course
Diploma in Event Management
Diploma in Film making and Video Editing
B.El.Ed. (Bachelor of Elementary Education, 4 years long course)
Diploma in Elementary Education
BP. Ed. (Bachelor of Physical Education)
Primary Teachers Training course (can follow it up B.Ed.)
Bachelor of Fashion Design and Technology
Bachelor of Fashion Communication

Game programming, a subset of game development, is the software development of video games. Game programming requires substantial skill in software engineering as well as specialisation in one or more of the following areas, which overlap heavily to create a game: simulation, computer graphics, artificial intelligence, physics, audio programming, and input. First a fall, you have to understand what is game development. Then decide is really I am interested in it. If yes, do I have the required skills for that. There is no specific procedure. You can be a game developer at any time like it has nothing to do with your subjects. But I suggest you should atleast take a graduation. I will suggest you to take B.Tech/BE in CSE or IT or BCA. They will help you in your career in game development.
There are also various online courses and certificate courses in game development that will help you start your career as game developer or game programmer. For game programmer you should be very good at programming Languages like C, C+, Java and others. Think calmly and then Decide.
Good luck!